Side by side, a 4wd will ultimately do more than a 2wd....no doubt about it. But the 2wd will do plenty of quality FEL work for you. Its definitely worth putting a loader on your tractor. Half the time you don't wouldn't use 4wd if you had it, and half the rest of the time your front wheels are up in the air and 4wd isn't doing anything for you.
With a couple of tricks, you can work right with the 4wd lads....One is to put use a reasonable size front bucket. I'd say on your tractor 48" width is max. Next is to put a "tooth bar" on that bucket. That one will amaze you what it will do. And finally, I'd put a 4 to 5 foot wide box blade on her and clap an additional 400 lbs on that box. Now those rear tires are really going to dig in.
So keep the bucket width under 48", put quick detatchable teeth on the cutting edge, and add a small 3pt implement with a LOT of extra weight. Now if I had a 2wd tractor with those things it would work with any 4wd without them. In fact it would even do better than most.
And after you've done all that and are enjoying the way that loader is working you are now ready for the "final touch"....the "coupe de grass" if you will.........That's then you add the giant killer: power steering! I've heard that there are still some aftermarket power steering kits out there. Adding them is more than a bolt on, but worth the trouble because I guarantee you that at that point you would have a 2wd that you would not swap for a 4wd. And for less money, too.