Thoes Appolish fans do look great, but I do wish they where not thermo controlled, every thermo controlled fan I've seen suffors from the same thing, that of no matter how hot an area within a computer they are used they never seem to speed up.
If you want a couple of fans for the top I'd sugest the YATE LOON 140mm - D14SL-12 with 4 Red Leds £6 each from Chilledpc.co.uk
http://www.chilledpc.co.uk/shop/prod...roducts_id=913
I used thoes in project spork and I was very impressed with how quiet they are yet still move a decent amount of air