I installed the stock HSF from my Barton onto a stock T-Bird 1.3, and it's not *dead* silent, but it's far from noisy. I only tested the computer without a case so far, so once locked in, it'd be "almost" inaudible.
Temperatures are quite discutable though. I can't check 'em right now, but I think they hovered into the high 40s Celcius in idle state and going into the 50s under load, according to Asus Probe. That's about the same temps I get with my Barton 2500+ running at 2.2 ghz with a Silent Boost hooked on.
Maybe it's normal for a T-bird, I know those were known overheaters, but I've never tried it with another HSF in order to compare. :/