I'm about to buy components for a new computer (a hackintosh as it happens, so I'll need to check any recommendations' compatibility using
this and
this, but I can do that myself

). I've picked them all (including Intel's P67 chipset and i5 2500k 3.3GHz processor) except the video card and case. I want these to be
reasonably quiet, hence why I'm posting here! (My standard is my current Core 2 Duo iMac - I'd love it to be as quiet as my old fanless G4 Cube or iMac DV, but will settle for less.)
I'm looking for a tradeoff between low noise, low cost and moderate performance. Cost should follow the other 2 criteria - I want to spend just what I have to. I don't do any AV work and play games very occasionally - the most demanding thing I'll play is Civilization 5 in Windows. There's a
good ranking here of how well different cards handle this, so can anyone point me to cards around the recommended spec that meet my requirements? If there aren't any that are acceptably quiet and cheap, I'll give up on Civ 5, so what compatible cards would you recommend for a user like me?
Hackintosh users have recommended me the Gigabyte 5570/5770 Silent Cell, which are perhaps a bit more power and cost than I was after but more importantly don't fit my provisional choice of quiet case (the Antec Sonata III, which takes cards up to 10.5 inches). I'm open to changing my case if anyone can point me to a larger quiet one. However, my impression is that these cards need their huge heatsinks because they're powerful and so hot, so if anyone can recommend some slightly weaker quiet video cards that'd be great.
Many thanks in advance
