I've used the HT750/HT1250 line of radios before, and have owned them on VHF and UHF and don't see any problems with them. Yes, the older ones were flaky on VHF, so avoid those from 1999 especially, but when you have a decent one, it's a fine radio and very sensitive. I used the VHF one I had for railroad monitoring too, and found the receiver to be hot.
Some of the audio issues with the HT1250 lineup were solved with firmware upgrades. I had one that came with version 4.00.00 or so, it had an "issue" where RX audio caused the speaker to make a popping sound when unmuted, it wasn't a noticeable issue except when signals were weak and choppy. I had it upgraded to then 5.08.00 (now they're up to a significantly high level) and that disappeared. There were issues with the built-in clock not keeping good time, these issues were also resolved. The radio itself is just fine now.
With the MTS/MT line of radios, there were and currently are still issues with the display going bad, losing pixels, lines etc. The PD I interned with last year used MTS2000 radios and few, if any, had displays that weren't totally unintelligible. So, if you do go with the MT2000 route, you'll probably have that issue at some point, even if the radio is fine now and you baby it. The volume knobs on these radios also tends to be loose, so any bumping of it could send it to max-volume rather easily.
The HT1250 is smaller than the MT2000/MTS2000 radios, and has a lot more features/ creature comforts like an RSSI guage to see how strong signals are, battery indicator, clock, and buttons that can be programmed to do stuff with both short and long presses, effectively doubling the number of programmable options to the buttons (and there are 7, the orange top button, 3 on the side and 3 on the front).
I was very pleased with mine and had it from 2003 until just last year. I since upgraded to an XTS5k w/FPP. Another option you may want to look at is the HT1550XLS, and while it will cost you significantly more than an HT1250, it has the ability to have frequencies altered from the front keypad and also a larger multi-line display. People with these already tend not to get rid of them, hence I don't seen any on eBay very often. If you want smaller form-factor, but all the same features as the HT1250, you may want to look at the EX600/EX600XLS portable radio, it has more channels (160) and is smaller, but has the same display.
This is my 2cents. Some people live and die by the Jedi line. I have never had much luck with them, aside from the VISAR, which few like, but I really do. Avoid the HT1250LS and LS+ radios because they don't do many conventional channels.
Good luck in your decision.
-Josh