Looking to buy modular power supply

[MMMMMMMMMM]

Hey guys I am looking to buy a modular power supply and need some help. I am currently using a corsair 600 watt ATX power supply, but I'm tired of the unused cables so I want a modular one. I am currently using a single GTX 460 but may SLI in the future with either GTX 460's or GTX 560ti's. Is 700 watt power supply enough for over clocked I5 2500k and future GTX 460/560ti SLI?
Do non "SLI ready" power supply's have the necessary pin connectors for 2 cards? Are OCZ and cooler master power supplys good quality? Also has anyone every bought anything from ncix.ca or canadacomputers.com before? I noticed there prices are cheaper on some things than newegg or tigerdirect for some reason. I'm thinking of getting one of these:

1. Corsair CP-9020003-NA Enthusiast Series TX750M Modular Power Supply - 750W, 80 Plus Bronze, Single +12V Rail ($120)

http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=580996&CatId=5440

2. OCZ OCZ750FTY 750W Fatal1ty Series Power Supply - 750 Watts, 80 Plus Bronze, SLI Ready (Dual GPU), 135mm double ball-bearing fan with red LED lighting ($104)

http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=6285097&CatId=2533

3. Corsair Enthusiast Series Modular TX750M 80PLUS Bronze Certified 750W PSU (CP-9020003-NA) ($90)

http://www.canadacomputers.com/product_info.php?cPath=33_443&item_id=040599

4.OCZ ZT-series 750W Fully Modular 80-Plus Bronze Power Supply (OCZ-ZT750W) ($106)

http://www.canadacomputers.com/product_info.php?cPath=33_443&item_id=043056

Intel I5 2500k
Corsair H60
Asus P8Z68-V Pro/Gen3
16gb Corsair Vengeance 1600
Asus GTX 460
Corsair 600 watt
Samsung Spinpoint F3 1TB 7200
CM Storm Scout

 

[Mjolnir]

A quality 650W unit would be fine; but 750 is a good spot to be at. Get the Corsair TX 750M for sure over the OCZ.

 

[MMMMMMMMMM]

Ok thx, this is sort of off topic, but what does sleeving your power supply cables do? I was looking through the show off your system thread and noticed some people sleeve there cables.

 

[Mjolnir]

That's basically all sleeving is for; Short of keeping things neater. It's a long task to re-sleeve your power supply though.. And if you're not sure what you're doing (You usually need to pull apart your PSU; if you want to fully re-sleeve from within the PSU), you could damage it. But it's definitely something interesting to do.

http://www.canadacomputers.com/product_info.php?cPath=33_443&item_id=039392

I would; personally; buy this PSU. Will handle GTX 560 Ti No sweat with a sandy bridge system. Fully modular, Gold efficiency. Seasonic superb quality. Would be my choice.

 

[MMMMMMMMMM]

Will it handle SLI?

 

[Mjolnir]

I would; personally; buy this PSU. Will handle GTX 560 Ti No sweat with a sandy bridge system. Fully modular, Gold efficiency. Seasonic superb quality. Would be my choice.

 

[MMMMMMMMMM]

Sweet I'm going to get that one then.

 

[Jaydu]

+1 I picked up the 850 just after Christmas they where on sale for 35 dollars off and I think the x-600 was 124 at canadacomputers if my memory is correct. great psu love it.

 

[Bobnova]

The Corsair 750 will not do you wrong. They're great PSUs.

The one Mjolnir linked is even better though. That's the one I would get.