Will either of these PSUs be enough?

Solution

perfect! it is a good one


Will I be able to do a moderate overclock of the CPU and GPU while maintaining a bit of headroom with this model?
 


Really? It's a good build? Thanks!

How about this PSU, lots of good reviews and it's in a good tier on that page, great price right now

Check it out

 


Where is the rebate? Also, can you compare it to the PSU I just posted in my last message? Thanks!
 

perfect! it is a good one
 
Solution
It's a mail in rebate. It says below the price. You'll have to pay full price initially, then you'll get a $25 card in the mail.

Take a look at this.

110-B1-0750-VR

Notice the B1? Those are the ones to avoid.

110-B2-0750-VR

These are the ones you want. Notice the B2?

The B2's were built by Super Flower. Much, much higher quality.