Photography lighting..?

whats a good flash that i can use with my canon rebel xti? i want something good but very cheap like around 50 - 150 max. somthing with power. thnx

Promaster makes a pretty good unit at a decent price. If you buy one make sure you get the correct adapter because Promaster's use interchangeable adapters on the bottom of the flash unit for different cameras. You want to make sure the one you get will that you can. If you're going to buy it from a local store bring your camera with you when you get it and you will be sure of getting the right adapter. If you're going to try and buy it online, read the description very carefully to make sure you get the right one.
Be aware however that no electronic flash unit will ever replace the dedicated units that Canon makes for your camera. The Canon flashes cost more but they are the best things you will get for your equipment.

Look for a dedicated flash that supports ETTL-II for best results. Your options new are kind of limited in that price range. I'd go with a common name brand like Sunpack or Sigma. Check http://www.bhphoto.com to get an idea of normal pricing in the US.

Promaster, a generic brand sold by many smaller camera stores, has one for the Canon system. It is around $150, has bounce and swivel capability, guide number of 100 at ISO 100. Canon makes more than one flash and if you don't need the capabilities of their top model, you might be satisfied with one of their less expensive models, such as the 430EX.

check on yahoo shopping
and adorama.com

Many of the promaster and vivitar flashes have trouble operating with the newer Canon cameras. They are supposed to work, but can have problems communicating with the camera properly. It is best to get one of the Canon speed lights 580ex, or 430ex.