Thanks for the tips, someone at work just pointed out the following card which I will be looking into;
SPARKLE Computer
Supports DX10 and is passively cooled which is nice, the power requirements I am not so certain of however and It won't fit in the custom case I am currently using but looks like it will do the job
I have a few old machines to start testing on so will be sure to post up my findings.
Thanks,
Keegan