Well, after having a 9 page thread on what PSU to get, and spending a week of just reviewing, ill help contribute
Northwings and tdrez72, you absolutely, positively dont need a 600w PSU. You dont, none at all, end of discussion.
I was thinking of getting a Seasonic 600W SLI psu, and after trying to justify it by saying i might one day run dual 7800GTX's and 4 sata drives (with crap loads of other stuff), i still found that 500W or so is more (again, MORE) then enough for even a set up like that
so, on that note, 600W is useless, pointless, needless, dont get it, dont do it, stop asking about it
Also, a few good ones i can reccomend for $130 and less is the Seasonic 500W S12, Enermax Noisetaker 485W, Antec TruePowerII (any wattage), ePower Tagan 480W, Fortron Bluestorm 500W.
Pick from any of those and you wont be dissapointed.
If you need to go modular (ie, like a OCZ Modstream) get a Antec Neopower over anything else.
WHATEVER YOU DO, DO NOT GET A X-CONNECT unless you want to play russion roulet with your system (these have been known to fry systems, as some are good and some are really bad).
Again, stay away from the X-CONNECT's, at least get a OCZ at minimum.
So, quick recap, 600W is useless, 400W - 500W is perfect
Ultra X-Connect is the devil, stay away
Get a Seasonic, Enermax, Antec, Tagan (ePower) or a Fortron over anything else. PERIOD.
600W is useless.