The A55 is not a dslr, as there is no reflex mirror.
Will with HD you are looking at the 2 best in lower price range. Both the T2i and A55 shoots HD at 1080. The canon will give you more lens options.
Since the A55 uses a evf vs vf, if you shoot action. You can not take full advantage of the camera high burst rate. You will be limited to 3fps, as the evf does not refresh fast enough to allow you to take your target. But it does do sweep pano with the 10fps burst.
Super Frequent Flyer, no joke. Ex Patriot and loving it.
Canon Eos 60D, T1i/500D, Eos1, Eos 630, Olympus EPL-1, and a part time Pentax K-X shooter.