I am thinking of selling off some of my gear to get a 40D. It is only a thought as of right now and the biggest item I will be trading in is my Sigma 10-20. I love the lens and how wide it can go but sometimes I feel I could as easily just stitch 2 shots from my Tamron and get the same thing(as long as it is a non moving subject)

I am looking for all your opinions on the 40D and hopefully a comparison from someone who owned a older xxD model and upgraded as I will be going from a 20D(keeping the body as a backup).

I am just concerned from a lot of reviews I have read in that the 40D sensor is actually physically smaller then the 20D with more MP = bleh noise at higher iso.

I would sell ALL my gear if I could get a 5D and a 24-70 or 24-105 but that is just not an option as 5D's still go for around $1400-1500 for a used body and then the good full frame L lens start at $1000+