I've done pretty much the same as you SuperK. Adding the 60mm exhaust fan helped out a bunch. I also added a fan duct from the stock 80mm in the front of my Cent.5 with another 80mm inline directly under the gfxcard fan. At night it idles at 49, and after about 4 hours of Titan Quest, it gets...
I bought an HP printer from Buy.com for Christmas with a $40 MIR. Sent in the UPC from the box with receipt, and got a card in the mail saying the same crap.
MIR generally suck...:(