MK26 with a couple of Zaward/OcUK Golf ball fans, will keep the card silent at sub 60c at stock. MK26 is also good for a mild overclock, for example 1100/5500, but is not recommended for maximum OC as the VRM/Memory runs a little hotter with this cooler.
But if you want a mild overclock and wish to game in silence, this is perfect cooler.
Gibbo, is there any other VRM and ram heatsink/chip coolers you can buy which are better than the ones which come with the MK26? I found them to be fairly poor before. Mainly just sticking. If there is some, which would you recommend? Also I've already got a Mk26 on my 6970 so can I just slap that on a 290? Depending on if I can get some VRM and ram coolers.