Dell SFFs have always been rather cool (in both ways). Of course by having BTX the cost is a little higher (went to see the rig on dell.com and its quite costly also)

Dell has been using BTX ever since they had a fair number of RMA issues after they first started selling systems using Prescott (and its relatives). BTX is brilliant in cooling, but too strict in design-even motherboard components must follow exactly as Intel specified it. This doesn't work out with enthusiast systems and especially AMD systems as the component layout is different-particularly that for AMD systems the ram is very close to the processor because the memory controller is on the CPU. And if I'm not mistaken to use BTX Intel collects licencing fees. Overall its a flop, even Intel isn't backing up the design much anymore.

new some fan for exhaust...since it only got intake