Do you need to simultaneously monitor two bands at once? If so then you need the FT-8800/8900. If you don't plan to actively use two frequencies at the same time but do want a removable faceplate then the FT-7900 is your choice. If you don't need UHF or a removable faceplate then the FT-1900 or FT-2900 are fine choices.
The FT-7900 is about as good a dual band radio as exists, you can't go wrong with it. I think the controls are better than than FT-8800, the knobs are a little bigger, the buttons are backlit, the display is larger & clearer.
I had a FT-7800 that I sold to upgrade to the FT-8800 to have dual monitor. I can be using one side to chat while continuously listening on another. Typically that means one side is a repeater and the other a simplex. The knobs can be fiddly and are not backlit, which can be a PITA. Also the lower left and lower right volume/power/squelch knobs can get broken easily. I've replaced one in mine due to dog-inside-a-small-cab-stepping-on-everything syndrome.
Kenwood makes good stuff, if you need to use cross band repeat a lot they may be a better choice. The last few posts were about that. Most hams use the feature rarely so it's really more hypothetical discussion. I like having the option in a pinch but it's a low priority selling point to me since I don't use it regularly. YMMV.
Some people prefer or dislike a brand for various reasons. I've had one Kenwood in my life and the LCD screen went bad, a TM-241. My understanding is that the TM-D710 can suffer from LCD failures at a slightly higher than typical rate, too. It's generally very rare, though, so I wouldn't be worried. The Yaesu radios (with the exception of the FTM-350 and the FT-8800/8900 knob thing I mentioned) are generally very rugged.
If cross band repeating is not important, shopping between the major brands comes down to which interface you like best, which brand & model have a solid reputation, cost.
Seriously, thanks for the info. Since I never used it I never had to confront those issues.