I7 SFF build - enough power?

i7 920

MSI X58M (micro-atx)
http://www.newegg.com/Product/Prod [...] 6813130227

OCZ Gold 6GB (3 x 2GB) 240-Pin DDR3
http://www.newegg.com/Product/Prod [...] 6820227365

SAPPHIRE 100258-1GHDMI Radeon HD 4850 1GB 256-bit GDDR3
http://www.newegg.com/Product/Prod [...] 6814102837

SILVERSTONE Sugo SG01-BF Black Aluminum / Steel MicroATX Desktop SFF Chassis Computer Case - Retail
http://www.newegg.com/Product/Prod [...] 6811163116

Western Digital Caviar Black WD6401AALS 640GB 7200 RPM SATA 3.0Gb/s 3.5" Internal Hard Drive - OEM
http://www.newegg.com/Product/Prod [...] 6822136319

SAMSUNG DVD Burner Black SATA Model SH-S223L - OEM
http://www.newegg.com/Product/Prod [...] 6827151188

OCZ ModXStream Pro OCZ500MXSP 500W ATX12V V2.2 / EPS12V SLI Certified CrossFire Ready 80 PLUS Certified Modular Active PFC ... - Retail
http://www.newegg.com/Product/Prod [...] 6817341016

I accidently ordered the wrong PSU though. I was going to get the 600 or 700 watt version of this series of OCZ psu's. I am now wondering if it may be enough anyway for this setup?

I am not a gamer (I have a XBOX360 for that, and barely use it). I just wanted a SFF media PC that would be a great performer for years to come. I realize the i7 is overkill for my needs but the price difference of this setup versus an E8400 or something, was only a couple hundred dollars. Microcenter has a great deal on 920's ($229) that was just too hard to pass up. Even the 4850 is overkill for me, but I got it in a combo deal with the memory and figure it will last quite few years as well.

Anyway...Do you think this will be enough power? when I put my system in the "power supply calculator", it tells me I would need less than ~350w. Even overclocked a bit, it tells me like ~430w. I dont plan on ever adding a second card or anything like that, so headroom is not all that important to me. Need to decide if I need to return it when it gets here or not. I'm thinking it should be sufficient for me, but would like some opinions. What do you think?

Yea it def is overkill. I figured if I spend a couple hundred bucks now though, I'll be all set for a long time. I guess I just wanted something more future-proof in case my needs or wants change in the future. Thanks for the opinion.

Anyone else running an i7 on ~500w?

IMO I reccomend this PSU, it is a very reliable one and can pull more than its rated,

http://www.newegg.com/Product/Prod [...] %20corsair

I guess its a smarter idea to do that, I guess OCZ PSUs are okay.