Antec case /w PSU vs CoolerMaster Case + PSU? Enough Pwr?

Hi everyone, at some point this summer I'll be building 2 identical computers and am a little unsure about the PSU requirements of today's tech.

Likely Components:
E6600 (which a small overlock, something stock/air cooling can handle)
BFG OC 8800GTS (640MB)
2GB OCZ DDR2-800
1 HDD
1 DVD-RW

Which brings me to the question: Which of the below options is better in your opinions?

- Antec Titan /w 550W TruePower 2.0 ($174.79 CDN)

- Antec Performance TX1050B /w 500W SmartPower 2.0 ($145.49 CDN)
- Antec Sonata III /w 500W EarthWatts ($143.00 CDN)

- CoolerMaster Elite RC-330 case sans PSU ($39.15 CDN)
+ OCZ GameXStream 600W ($106.79 CDN)
= $145.91 CDN

So I'm just a little overwhelmed with options here I guess. Yes, I've read Mpilch's sticky but I'm still unsure. The Earthwatts is listed on there as having enough (34A or whatever) but then the review linked there says this:

"Yes, it's a 500W... but use the Enhance or Silverstone 80 Plus 500W units for comparison... They have 432W on the combined 12V rails. This Antec only has 408W on the 12V rails!"

I don't see the other PSU's on that list though, but I read on other sites the OCZ 600W is decent. But I'm also unsure about total Wattages need to run and lightly OC the system? A calculator I used put it in the 450W range I beleive, but who knows how trust worthy those are..? (or if I did it right haha). I know overall Watts aren't as important as that 12v Rail guy on a quality PSU, but still some places say 500W is enough, some do not ><

I guess I should mention aesthetics aren't really important at all for case choices. Oh, and maybe also consider air flow? The CoolerMaster is said to have excellent airflow, but I like the size of the Antec cases + fan options for that also...

Anyway, thanks for reading and please be gentle in your responses

Cheers!

I have the 1050XB case and I like it; no card made won't fit in there and the airflow seems to be really good.

All of my components run very cool.

I did replace the smartpower with a NeoHE 550 W.