Your card might not be Cross Fire ready the one you linked to is not. However if you do have a crossfire ready HD 7750 yes the will crossfire with absolutely no problems on that good quality PSU you linked.
Just as a note, you'll be a lot better off selling your 7750 and getting a single, more powerful card. Crossfiring low-end cards is a LOT more trouble than it's worth, when you can get a more powerful card that'll work on more than just the games that support crossfire, AND won't have microstuttering and other such issues associated with xfire and sli.
I would have to agree with DarkSable's assessment. The 7750 you linked is a 128 bit card and you will get much better results from a better single card than trying to crossfire two of those. It'll end up costing you a little more, but the return on investment will be much greater.
Also... after checking on Tom's reply, I'm going to take a stab at it and say the card you have is not crossfire ready either, so either way you're better off going with a 7850 or similar card.
That PSU would easily power a Radeon HD 7870 or a Radeon HD 7850. I would suggest you get one of those instead. Crossfiring two 7750's would give similar performance but it might be a bit iffy because you would be pushing the limits of your PSU.
Thanks for all the replays, i currently have one 7750, got it from Newegg. I'd rather not go through the RMA Process for the card. I feel it would be a lot smarter to get a single 560 ti or something, but i'm not if i really should go through the RMA Process with Newegg.
If i did crossfire, is this card basically the same as the one i have now, (Just looks like a different fan?)