just curious why you think Power is so amazing.
Well all the high end systems I've worked on (with >64 cores/CPUs/procs/whatever) have been Power systems using AIX. Windows has never come close. Oracle is often the DB to host.
The only other high end box I've come across has been the mainframe. But then they are a different beast filling a different need (stupidly high I/O) for a particular market (FSS mainly).