Could not be happier with our 2012 nexus 23P (24') this after 4.5 years and 41,000+ trouble free miles. The power and reliability, not to mention serviceability of the V -10 powertrain is unmatched.
Look long and hard at how you will actually use your coach and buy the rig that best meets that need. If you are ever going to tow anything get the V-10. Unless you are going to be in a full hook up site every night do not get an on-demand water heater. Spend time in any prospective unit pretending to be living in it. How's the headroom, storage, OCC???
Do you have to make up a bed every night? That will become a huge PITA on night two. Does the bed have a quality innerspring mattress? If not you will regret it. Can you see out? Many units have few and poorly located windows which quickly becomes dreary. How's the ventilation? Power fans, AC and how about the heater? How many BTU's does each put out? {My 24' Class C came with 13,500 BTU AC and a 35,000 BTU furnace both of which have had extensive use}.
Check the galley thoroughly. Can you stand at the stove and actually see what you are cooking without bending over? You would be surprised at how many $150,000 rigs this is not possible and don't get me started on one tiny and one medium burner, no oven and a microwave the size of a shoe box...Arrrg!
Power awning, seats, remote control mirrors are all very nice to have. Fuel, water, black and grey tank capacities need to be checked vs the GVWR of any unit. If you cannot run with full tanks and still be under GVWR it is the wrong coach.
The absence of a one-piece fiberglass roof with solid end caps should be a serious deal
breaker. Look deep into lockers and behind drawers... find particle board/plywood? Run Forrest run!
Lots to consider I hope some of these suggestions are helpful and...
As always.... Opinions and YMMV
:C