We have a 2619 that we bought used. It was in good shape and we like it a lot (2 adults + 2 dogs). We had been long time tent campers, and the TM has sleeping on the ground, beat hands down!
That being said, I think I'd opt for a 2720SL next time. It would still fit in the garage (which is an issue where we live), and provide a little more room. We really don't need the second bed provided by the 2619 (dogs sleep there now, but they could just as easily sleep on floor), and the queen sized bed would be a welcome change.
Other amenities (stove, bathroom, refrigerator, sink, AC, etc. are the same in both).
Nick