Oh, 500D. Thanks guys. I'm used to the entry-level Canons being called X-something or Rebel-something in the States. Had no idea what a T-something was.
Dave, I've been around, just haven't had much to say for myself. I've lurked a lot, but few of the threads here have much relevance for me these days - I don't own a TV or a home theatre or a stereo system or have any particular computer needs beyond what the Thinkpad and a variety of whatever-bits-are-lying-around-at-the-moment desktop systems provide, don't follow US politics, have heard (or possibly written) most of the idealogical rants several times over - so I've been following the old adage, if you don't have anything useful to say, say nothing! (I do have a fair bit to say on a local Australian photography forum, however. And you can always see what I've been up to lately by visiting
http://tannin.net.au
Dave ..... my advice is:screw the gear. Take pictures.
With that said, I haven't tried an T-whatever, but I'm familiar with the 400D and the 450D, plus my 50D has the same sensor and some of the same firmware as the 500D, so I can hazard a pretty reasonable guess. First up, I don't agre with Lunar about the "12MP limit" theory. There is
nothing about the 15MP 50D that isn't either the same as or better than the 10MP 40D. The 50D is a remarkably well-rounded camera; Canon's best mid-range product since the wonderful 20D in my opinion, and distinctly superior to the lack-lustre 40D or the change/no-change 30D.
The colour and detail resolution of the 50D is excellent. The pictures it takes are superior to those of the 40D, and even to the 20D - which I continue to regard as bit of a benchmark, second only to the 1D III for rich and pleasing, yet nevertheless realistic tones. (Better in that regard than the 50D too, though inferior in detail, of course.)
Whether these advantages hold good for the 500D I don't know. The 10MP 400D didn't produce as good an image as the 10MP 40D, so maybe they try harder on the more expensive models, but on the other hand, the 40D was later, so maybe it's just a refinment-over-time thing.
In the end though, anyone who spends phenomenal amounts of time stitching together vast panoramic patchworks really ought to aim at getting the highest quality basic images to start with - and that means a 5D II. (Well, short of going ballistic with the credit card and going for a 1Ds III or a D3x.) And if you are going for a 5D II, you'll have enough to spend already, on lenses.
But screw the gear. Take pictures.