PLEASE read my article about UPB in my signature - it explains key differences throughout the Simply Automated product line. I say that because the 240's are a misunderstood switch IMO. They have their place, but they're not a universal switch as they may seem on the surface - in many situations a 1140 is much more appropriate. Not to say you can't use a 240 like a normal 1140, but there are key differences.
Also - not sure what $350 switch you saw, but 1140's and 240's and 2240's dim LED just fine... I run a bunch of 1140's and 240's and have 30+ dimmable CFL's in my house and they mesh just fine.
this is the best article on upb that i have read, i wish that i had seen it before i started buying thank you so much for writing it, i will have that one on hand for all of the rest of my process!!!!!!!!
ps. and i don't use exclamation points liberally.