Hmm. True, V8 isn't looking that good.
I'm actually thinking the Thermalright Archon might be the one to get, it's very slim so it should fit. My stupid motherboard has almost no clearance for the RAM, the first slot is only maybe 5mm away from the bracket screws.
I forget what case you have the Archon is 170 mm tall.
Otherwise the Megahalems and Armgeddon are also very good choices.