I have not used Tt cooling since the Big typhoon. That cooler was so good, I even hooked one up to my X1800XL.
That said, lost cost, and top-level performance, while not making a lot of noise, is key for me. An easy mounting system helps too, as doing reviews, I change coolers often, and quick and easy, secure mounting is very important there.
No fancy colours, and no plastic shrouds unless they help. Providing variable-rate fans with potentiometer controller is not an OK substitute for low-noise, but PWM-based fans are.