my girl friend has a xp1700 thats overclocked to 2.2ghz @ 1.6vcore with corsair memory, and all the other goodies (g4, cd burner, dvd rom etc) and its running no else than 46C at the worse of times (ie the hotest part of the day etc).
she has the slightly older xaser 2, but it cools down rather nicely. i believe by me putting a better cooling fan on it, im sure i can get the temps right down... im using a falcon rock heatsink/fan combo, so its not the best, but it does work..
im going to uprate the fans so that more air is pushing into the case, but other than that, i cant fault it. even with the 5 fans working, its not really noisy and to me it doesnt bother me after a long time using the pc.
i hope that has helped you in some way with your choice 🙂