Unless you have a flat smooth yard, I think you will be wasting your money. I mow about 1 acre, maybe a little more that has some hills and also some weeds too. I started out with a cheap rider, tore it up in 4 years. I then bought a cheaper John Deere (a Scotts) at Lowes. It did OK but the yard had to be almost 100% dry or it slipped around a lot on the wet grass. I then bought my BX. I hung on to the Scotts thinking I would mow with it if it was dry out. I never touched it, I always used the BX. I finally sold the Scotts mower cheap to a co-worker.
If you have a rough a weedy yard, which most people that have bigger yards do, a cheaper mower probably won't do any better than a BX. If you got into a zero turn it would probably do a better job but you won't get into a good one for $2100.
One bad thing about a BX is they are pretty heavy. The front wheels smash down the grass. You can try mowing in different directions to help that some. I put a mulch kit on mine not long after I got it and that helps a little bit. For that $2100 you are looking at I'd spend it on weed killer or fetlizer instead, that will do more for your yard.