Honestly, I really don't think the character is in anyway too powerful. QUOTE]
The problem is each players perception of over powered...
In our average game we use a 32 point buy, and magic items are rare.
And when you do find a magic item it isn't usually the perfect items to build the ultimate power character.
These items are all dependent upon the groups play style, but I can guarantee that my 10th level monk from our campaign wouldn't last more than a couple of rounds in a slug fest with one of these monster characters (of an equivelent level of course

).
It is all about what each person/group finds enjoyable.
I have also found that prestige classes bump up the average power level of a campaign very quickly, and we have set in place a system where you have to justify why you should attain a Prestige Class.
And I want to have it is just not enough of a justification
So to answer your question I would not play in a group with a power level as high as you describe, but that is my personal preference.