Graphics Cards Help

I want to buy a new graphics card and this is the one I had in mind BFG GeForce 9800 GTX+ OC 512MB PCI-E Video Card

I did a little looking around for prices on newegg and I came up with two more video cards that are similar but different in prices.

Zontac GeForce 9800 GTX
Evga GeForce 9800 GTX
BFG GeForce 9800 GTX+ OC on Newegg

The BFG card is obviosly better, and I'll probably end up buying that one, but is there really that much of a difference between the cards?

My second questions is the power supply. I'll definatly need to buy a new powersupply, but i don't want to spend a lot of money on it. I found this one on newegg - Apevia Power Supply - is it good enough to run the BFG card and why/why not?

 

BFG and Evga are both excellent brands, you can't go wrong with either. Apevia is crap and I wouldn't even think about that. There are some Thermaltake units at good prices.
You need a minimum 450 watt psu for single card.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817153052

 

Why is Apevia so bad? I don't mind paying 40 bucks for it, most reviews on the site are good, I just don't really know if there wilol be enough amperage to power the supply. I don't really understand the tables.

I ALSO just relized that new egg doesn't ship to Canada... is there any other site i can go to that will, but not stupid expensive shipping?

 

http://www.tigerdirect.ca/
http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=719600&CatId=1079