Need help choosing a PSU please

this my current set up that I plan to order

Western Digital Caviar Black WD1001FALS 1TB 7200 RPM 32MB Cache SATA 3.0Gb/s
http://www.newegg.com/Product/Prod [...] 6822136284 $94.99

LG DVD Burner Black SATA Model
OCZ StealthXStream OCZ700SXS 700W ATX12V / EPS12V SLI Ready CrossFire Ready Active PFC Power Supply
http://www.newegg.com/Product/Comb [...] mbo.248328 108.98 (before 25$ mir)

G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600
SAPPHIRE Vapor-X 100269VXLE Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP ready CF ready
http://www.newegg.com/Product/Comb [...] mbo.256476 $269.98 (before 20$ mir)

Intel Core i5-750 Lynnfield 2.66GHz LGA 1156 95W Quad-Core
ASUS P7P55D EVO LGA 1156 Intel P55 ATX Intel Motherboard

http://www.newegg.com/Product/Comb [...] mbo.259877 359.98

COOLER MASTER RC-690-KKN1-GP Black SECC/ ABS ATX Mid Tower Computer Case
COOLER MASTER Intel Core i5 & Intel Core i7 compatible RR-B10-212P-GP 120mm "heatpipe direct contact" Long life sleeve CPU Cooler
http://www.newegg.com/Product/Comb [...] mbo.259675 89.98

Is there power supply I have there enough to power that, especially if i plan to in another month or 2 when price goes down to add another Radeon 4890 to crossfire? Also the fact that it only has Only 2 x Pci-e connectors is a bad thing even though it says SLI and CF ready? (I am not personally going to build it, I am ordering it and my brother will put it together). I dont want to spend over a 100 on a PSU if I dont have too..... Any help on whether this is ok or if you want to recommend a replacement please do

650W is enough to CF with that set up ?

This will give you a slight buffer and will be 99.99 after the 20.00 rebate:

http://www.newegg.com/Product/Prod [...] -_-Product

If I were you I would drop the crossfire idea and sell the 4890 when you are thinking about upgrading and get the fastest gpu out at that time.

Thats the best way to go IMO. In doing that you can get the cheaper psu now and still be fine later...