Of the four, I am really close to getting the p55m ud2 because of price and the feature it has. My main concern was the durability of the board. it is a mATX and does not have any heatsink on the MOSFET found in the other 3 heatsink. I was wondering if I should spend more on a motherboard that does. Any suggestion would be great as I need to build a system ASAP! Thankks!