Hmmm, I might be looking to buy these soon.  I like the 5850s and find them to be very efficient and I think I can cram 3-5 more into some boards I have laying around.  Need to clean up the house from the holidays first and get my rigs fired back up.

Depending on the price, I might be interested in the mobos as well.  How many PCI-e slots do the mobos have?  

You giving up on the mining game?