I second the Cub. Yes they are built by MTD, but they are the "flagship" brand. The dealer experience is critical. If you can't get service after the sale, then even a great sales price isn't so good when you have a nonfunctioning mower and the grass is growing 1/2" a day. As you can tell from my signature, I'm a JD fan. That's partly due to their extensive dealer network, of which my local dealer has a large operation only 15 minutes from me, and several other equally large locations within two hours drive. I have found they always have the part I need in stock in one of their locations, and can get me that part always by the next morning, sometimes the same day. And....if it's so important I have that part before nightfall, the other locations are close enough for me to go get it. Some will probably not believe me as it is a JD, but most parts at this dealer are priced comparably to aftermarket parts. I also have a very good Cub dealer in the area and have purchased a rider from them, but they are located 30 minutes away and can't offer the services the JD location can, simply because it is a one man operation.
Speaking of that rider I purchased from the Cub dealer....it was a White. This was in 1997, it was built by MTD and was a dealer only product at the time, not that big-box store crap White sells now. At that time, the White was literally one step below the Cub. Not having a trained eye, I couldn't tell much difference between the White and the Cub, other than engines, seats and other niceties that made the Cub more comfortable to operate. The White I purchased had the CVT transaxle you are asking about. I never had any trouble with it, and from a simplicity standpoint, I prefer the CVT. There are few moving parts, other than the drive belt and two variable ratio pulleys like what's on a golf cart. The one disadvantage of the CVT, forward to reverse transitions are not as smooth as with a hydro. You actually have to stop to shift to reverse. However, the one big advantage in my opinion is the durability of the CVT. I just really don't see a whole lot to go wrong in one. I kept that White for 10 years and never had one real issue with it. The only issue was a deck height indicator kept breaking, so after replacing it twice, I just never changed the deck height again. That mower still looked and operated like a new one when I sold it with roughly 600 hours on it.
I hope some of this info helps. :thumbsup: