WHY NOT? if it's better and it will have more quality why not?, i'm happy with my 350D but why not upgrade to something better? i really don't understand you guy's...The XT can take fantastic pictures. You have plenty of lenses
available. Why go full frame? May be I am missing something but I
am really happy with my XT. I bought the 17-85 IS lens, it is
REALLY good. Don't forget you can always sell your EF-S lens at a
good price if your are upgrade to an another camera.
Cheers!
Michel Briand
--
EOS 350D + Kit lens + Good eye
http://www.pbase.com/jdf_eos