GoodoleBoy,
So far, great advice. About 30 hp, wide 3ph brushhog or finish mower, R4's (industrial lug is midway between aggressive tread that tear up lawns and turf tires that spin if you try to pull or do too much).
I'd recommend a FEL (Front End Loader), as pretty much all the modern stuff easily removes the FEL in the single-minute range of time.
Also, backhoes are easily added.
Sub 30hp units typically offer a mid-mount mower (MMM), which are sometimes tricky to remove, usually specific to model of tractor (not interchangeable with other tractors if you ever change, OR need parts, etc), and sometimes make it difficult to do "tractor stuff" as the MMM impedes tractor clearance.
Of course, there are exceptions, but generally MMM's are "big mowers" whereas 3ph are "tractors that mow." Both have benefits, you just have to weigh what you are going to be doing the most. ie- MMM's are easier to mow lawns with lots of turns, but 3ph cutters do best jobs in open areas.
By the way, and someone correct me if I'm wrong, MMM's usually cut with blades in the 450-650 rpm blade speed, whereas 3ph finish mowers are around 16k rpm blade speed. That's why they do a good job, even in large sizes.
A finish mower is best for frequently mowed, obstacle free areas. Hit a few stumps or large rocks and you have issues.
A brush hog is better for rough cutting and better tolerate stumps, rocks, tree branches, etc.
Both mowers overlap in capabilities.
A Box Blade is invaluable and 6' around $300 is pretty cheap and VERY handy. Think of it as a very capable blade with teeth that can be used or move up out of the way. Can tear, spread, cut, dig, make trenches, etc. Pretty tough and trouble-free. Be sure to get one at least as wide as your wheels, or you will leave tire marks and kick yourself later /forums/images/graemlins/wink.gif
Backhoes... Let's put it this way. They are pricey. They can be rented. If you buy one, you WILL use it, and you will FIND ways to use it /forums/images/graemlins/grin.gif Never heard someone regret getting one, but also heard others comment that they are okay without one. You'll have to think this one through on your own. Guess it depends on your budget as to how hard you have to think about it.
If you get a FEL and no backhoe, FILL THE REAR TIRES!!! Most all brands in this size have such a power to size ratio that they get tippy without weighted tires and something hanging off the 3ph for counterweight. Save yourself and your tractor- it's easy and cheap. Lots of discussion about this and the options for fluids to use.
4WD? Yes, unless your budget prohibits it, then consider cutting elsewhere first. Most 4WDs can shift to 2WD, but not the other way around. No good way to add aftermarket, and you'll probably use it, especially if you have FEL and/or backhoe. It will also pull your 3ph equipment better and with less struggle.
As a comparison, I bought a 3510 (35hp) Mahindra with FEL, 84" finish mower, 66" tiller, 72" Box Blade, and 16' x 6.5' trailer for just over $20k. I'd suggest you at least take a look at this brand, as well as the ones others are mentioning. All good brands. I personally avoided the Chinese tractors, but you can make that choice- check out the brand-related discussion groups for this type of discussion. Each have pros and cons.
HST... Wish it was available on the model I bought. Would've paid another $1k-$2k for it. I am satisfied with the 12 forward and 12 reverse speeds (3 ranges), but HST is nice.
Diesel. They'll run all day and go easy on the juice. You can get offroad diesel and save some taxes. Flashpoint and storage is safer.
These are opinions- based on experience, but still only opinions. My suggestion is to read as many as you can get, and ask lots of questions.
Sometimes you'll find a "My brand is the only brand and you must buy it or you're an idiot" comment, but these are few and far between. Most posters here genuinely want you to get what is best for you and will showcase their own experiences and brand preferences based upon facts and experience.
And I think that's what your next step will be after you determine size and options.
Good luck, and make sure you let us know what you're thinking and why you eventually make the choice you do.
-JC
PS- Oh, and fair warning: We are very good at spending other peoples' money! /forums/images/graemlins/grin.gif /forums/images/graemlins/grin.gif Only spend what you're comfortable with spending. The laser leveled deck with GPS guided cutting patterns is nice, but probably not very practical /forums/images/graemlins/grin.gif