1/3 of the seats on an all-coach 737 are middle seats, but more than 2/3 of the seats on an ERJ are window seats, and they're horrible seats for me, because I can't put my feet straight down. On a 45-minute flight, I can deal with it. On a 3+ hour flight, I'm in agony. The only way I'd be able to stand a flight that long would be if I had the aisle seat on the right.
So yeah, I'm with MarineGrunt: On a long-haul, I really would prefer a middle seat and a stopover to a longer-than-2-hour RJ flight.
I wish you guys the best; truly I do. But don't try to pretend an RJ is more comfortable than a larger plane. It isn't. (Although the discovery of the secret-armrest-release button has made it a little more tolerable.)