There is an envelope feeder kit coming out sometime this year (summer?). Ask your Ricoh Solutions Engineer (the Fiery guy) about it. You can do #10s now but only with flaps open.I don't have any canon experience, but I did upgrade one of my 7110's to a 7200 and no regrets so far. Wish it would do #10 envelopes would be my biggest issue with it.
If you are trained on the TRCU program I would stick with what you know. I almost went down to the 5300 but glad I stuck with the 7200.
There is an envelope feeder kit coming out sometime this year (summer?). Ask your Ricoh Solutions Engineer (the Fiery guy) about it. You can do #10s now but only with flaps open.