i got one.. it's pretty good, stable (no crashes as of yet), fast and silent.. my amp makes more noise then the PC ;)
worth the extra money?
fifty fifty.. bonuses are only that it's pretty quiet and 19" rack mountable.. i'm sure there loads of others.
i got a middle range one, think it was like £1300 but it should last for the next 2-3 years i hope.
:)
Chaz.