why, worry about the camera? for me, it's as simple as being able to focus properly for sports. the xt just doesn't have enough juice to power both IS and af at the same time (hell, even the viewfinder display, you know, the green text, gets dim when af and IS are on at the same time). also, af accuracy matters a lot, even for newsprint. 20d and above is basically a must for sports photogs, unless you like a 10% success rate (don't say that you should manual focus it, because xt doesn't have the option within warrentee). just like a pumber wouldn't use a wrench that doesn't provide enough foot-pounds of torque, a photographer shouldn't use a camera that doesn't provide what you need.... of course, if price is an issue (which it always will be), then go for the best you can afford... (in my case, xt)
Is the low-power problem using the in-camera battery or with the grip and 2xbatteries? I've never ever heard of this problem before.
XT

"YES! I AM INVINSIBLE!"-Boris

