Deciding between 4670 variants... help greatly appreciated!

Hey everyone.
So I only have 360W Psu and the best card I have found that should work well with my psu is the 4670.
Firstly I was wondering if anyone has any other ideas for my dinky psu.

Here are 4 4670's that I have liked so far and I also need help deciding which one to get!
Newegg.com - HIS Hightech H467QT512P Radeon HD 4670 IceQ Turbo 512MB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Desktop Graphics / Video Cards
Newegg.com - HIS Hightech H467QS1GP Radeon HD 4670 1GB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Desktop Graphics / Video Cards
Newegg.com - SAPPHIRE 100256L Radeon HD 4670 1GB 128-bit GDDR3 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Desktop Graphics / Video Cards
Newegg.com - SAPPHIRE 100255DDR4 Radeon HD 4670 512MB 128-bit GDDR4 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card - Desktop Graphics / Video Cards

The HIS have 2 years warranty while the sapphire have 1.
The iceq turbo's on the HIS mean that they are very well cooled and the 512mb one is even slightly overclocked.

They all have their strong points but for the most part I'm looking for the best I could possibly get without upgrading my PSU.
Any help would be MUCH appreciated.
THANKS!

 

Welcome to HWF

First of all, I want to know if you want to play games at a high quality for about 1-2 years. If so, I'd strongly suggest the 1GB version. Some of the latest games (like GTA IV) are starting to need more than 512 MB of graphics memory. So a graphics memory of 786 MB or more is highly recommended.

 

Thanks.
Yes I would.
Im having some trouble deciding whether I should get the sapphire 512mb gddr4 model or the HIS 1gig gddr3 model..
The sapphire is also way cheaper.
Cuz sure 1gig of ram is nice but the gddr4 would be moving memory a bit quicker than the gddr3 (only a tiny bit)