i would consider going used and going with a bogen/manfrotto set. check the fm.com buy and sell board, it's incredibly active. the bogen/manfrotto tripods are worth the extra money. they are very sturdy and quick to set up. once you've used a good tripod, you realize the little bit extra money is worth it. don't you have the 70-200mm? make sure whatever head you get can support it and the digirebel. it's not the heaviest lens, but out in the wind and on a tripod, it can get moved around.
here's a sale at fm.com, for the bogen 3021 legs (very similar to the one you borrowed from me, the 3221) and the 3030 pan/tilt head (same as the one you borrowed) for $140.
http://www.fredmiranda.com/forum/topic/151376i'm sure there are plenty more on there. if you want, my 3030 pan/tilt head is sitting around unused right now since i switched to a ballhead. you are welcome to use it for as long as you like, i'll only need it if some day i add a second tripod, which is not happening anytime soon.