Which PSU should I get? (Non Modular or Modular)

Hi guys so I'm sitll deciding on what PSU I should get, I'm looking for 700 - 800 watts for SLI of a gtx 560 ti 448

Anyways this is my case that I'm getting: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

These are the possible candidates for the PSU i'm getting:

OCZ ZT Fully Modular: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

Corsair TX 750: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

Corsair HX 750: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

Cooler Master GX: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

Corsair Gamer Series 800 W: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

XFX 750: http://www.newegg.ca/Product/Product.aspx?Item=N82E1681...

I know people say like Corsair is da best get it, it doesn't DOA, but I kind of like the OCZ one, unless there's like a really *** part about it that I will regret for my life.