Economical rear exhaust graphics card suggestions?

[fleshribbon]

Hello, I am looking for a good but economical graphics card that has rear exhaust.

I have an OEM Gateway DX4820 and will be picking up an Antec 650W PSU. The issue is I don't want to change cases and the system is front sealed and only has a single rear 80mm unpopulated fan vent. So, there will be minimal case air-flow.

I was looking at the EVGA GTX 460 768MB because of the temperature and performance I read about from Tom's Hardware and I really like the idea of the rear exhaust but I really wanted to spend more around $150 max instead of $200.

Any help or suggestions?

Link to specs for my system
http://www.meetgadget.com/gadget/14546/Gateway+DX4820/specs
Intel Core 2 Quad 2.5GHz
6GB DDR3 RAM
750GB SATA 7200RPM HDD
Default onboard GMA X4500 graphics

 

[Onus]

You might find a HD5770 right around that price. I'd spend $5-$10 for an exhaust fan though.

 

[jenkem]

there are a lot of 5770's for that price with some pretty good coolers

 

[fleshribbon]

Best answer selected by fleshribbon.