<font color="red"> Incidentally, as a female, I am a "girly" type! Well, maybe not *too* girly since I will be the primary driver of this tractor, and probably the primary "fixer" of it as well! </font>
Sal as probably the least mechanically inclined (but I've been learning for the past 10 years) let me say that after reading your reply post, I'd strongly recommend the HST. They basically don't break. All the technical talk about CVTs and the comparisions to car transmissions and all that stuff basically is technobabble when it comes time for you to put your foot down and drive. With an HST you can simply push on a pedal and the tractor will go. You're not climbing steep hills and you're not trying to lift a mountain, so most of your work will probably be done in one range and the only thing you will have to remember to do is the routine maintainence.
The
B7510 is a nice tractor. Buy, borrow or rent a landscape rake to help clean up debris in the field. It will get most of the stuff. I find it most effective to drag the field in straight lines and then drag again across those lines. Unless there is stuff that is 1/2 buried, the rake should pull out the debris.
If mowing is going to be the vast majority of your tasks, you'll probably be more comfortable with a MMM (mid mount mower). Just make sure you ask the dealer to teach you how to "pin it up" for when you use anything on the 3pt hitch behind the tractor. Most MMM will go down when the rear implement goes down and come up when the rear implement comes up. So when you lower the landscape rake to drag the field you don't want the MMM to be down, hence you'll need to "pin it up" It usually involves raising the deck and slipping a couple of pins or clips into a couple of holes where the deck and the bottom of the tractor meet. Then you can drag the field with your rake and the deck will stay up so it doesn't get hit by any of the debris you are trying to clear out.
And by the way, the lovely Mrs_Bob picked out a Cub Cadet because the colors compliment her summer wardrobe, so don't be shy about coming around and asking for help or for that matter, showing us guys up from time to time with your accomplishments.