Re: looking from performance and TCO perspective...
"Is there any benchmark on the planet where itanium is faster or equal to POWER or x86?"
Yes. I suggest to have a look at TPC-C, for single servers running Oracle.
In 2007, Superdome 64p/128c 1.6GHz Montecito broke the 4Million tpmC barrier.
It took 5 years for Oracle to beat this number with a Sun X2-8 8p/80c Xeon E7 at 5M tpmC.
And the best Power result with Oracle is 1.6MtpmC, on a Power5 p5-595 in 2005. Power never ran TPC-C faster with Oracle.