Bad news... my initial land acquisition deal was a bust; my prime plot is not for sale. So I keep pestering... I mean, looking.Sounds like you're on the right track. I went with the slightly smaller but more comfortable B2650. I use it mostly for the loader and the backhoe though, no mowing. I use my ZT for mowing. Keep in mind that no matter what tractor/mower combo you end up with, your mow time will be significantly longer that it was on your ZT. So, make sure you are comfortable with the seating and control ergonomics. Personally, I didn't like the ergonomics on any of the standard L series, and I didn't want to spend the $$ for a grand L, so the larger of the B series was it for me. Good luck with acquiring more acreage.
Agree that ergos are key. I am only marginally comfy on the small L's; even with the seat all the way back, the floorboard and pedal is a little too close. I like the room on the L4701 and MX4800 better. I'm not comparing mow time to the ZT that's been gone 10 years; I'm comparing to the Craftsman 42-inch riding mower I have to keep working on, so I think anything will be an improvement.
I went to another dealer who had everything BUT a 3560 (had the bigger Grand L's and the smaller B's). I'm not 100% sure I like the GL from just sitting on it; I'm surprised to say I think it's too big and plasticky in the cockpit. I still like the L4701 and MX better. I could make a smaller L work.
They also had NH Workmaster and Boomer on the lot. I liked both of these for ergos, but I'm not sure I would like the two pedal HST on the Boomer. I like the location of the fuel filler and loader hydro connections on these; well thought out, among other items. I understand that these are made by LS and rebranded. I have an LS/Mahindra dealer close by; going to kick tires today for comparison.