Help with PSU

I'm putting together a new build and I'm trying to decide on a power supply.

Everything is going inside a Antec P182 with a Q9450 I plan to overclock. The system will have a total of 7 hard drives in addition to the following components:

• 1 EVGA 512-P2-N757-TR GeForce 8600 GT 512MB 128-bit GDDR3 PCI Express x16 HDCP Ready SLI Supported Video Card - Retail http://www.newegg.com/Product/Prod [...] 6814130290
• 1 MSI NX8800GTS 512M OC GeForce 8800GTS (G92) 512MB 256-bit GDDR3 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card - Retail http://www.newegg.com/Product/Prod [...] 6814127325
• 1 Tuniq Tower 120 P4 & K8 CPU Cooler - Retail http://www.newegg.com/Product/Prod [...] 6835154001
• 1 ASUS P5Q Pro LGA 775 Intel P45 ATX Intel Motherboard - Retail http://www.newegg.com/Product/Prod [...] 6813131299
• 1 DVD Burner http://www.newegg.com/Product/Prod [...] 6827129018

Originally I was going to go with:

Corsair CMPSU-620HX 620W http://www.newegg.com/Product/Prod [...] 6817139002

the specs list it as having 8 SATA connectors but I'm worried 620 Watts isn't enough. I definitely want a modular cable PSU with 80% efficiency. Ideally, I'd like to spend under $150 but I can go up a little bit if it's worth it. I was considering these PSUs as alternates:

Zalman ZM750-HP http://www.newegg.com/Product/Prod [...] 6817379006
Antec TPQ-850 http://www.newegg.com/Product/Prod [...] 6817371009

Can anyone help?

i need to run 3 monitors. the first card (8800) will be the primary monitor but the second won't be doing any heavy lifting so i can go with a cheaper card.