Best MM?

Sure, i like some LOMC, currently running Ortofon MC2000 with Gold Note phono stage. Very unusual cartridge, a high compliance MC with extremely low output, low impedance. This cartridge is hard to deal with, very critical about phono stage, wires etc. Sound quality is addictive. 

I've never tried XSV4000, but XSV3000 is a brother of the Stanton 881s (highly regarded in TAS mag back issue). It's $300-400 cartridge, amazing for the money, but not the best from Stanton/Pickering. 

My favorite Stanton CS-100 WOS is highly competitive with any LOMC, the sound of CS-100 WOS is seductive. 

The problem with any MC cartridges is re-tipping (imo).  

Totally agree with you about re-tipping @chakster .

I am hoping to be set up with a couple of decks so then it is the MM for everyday listening, Denon for dems, the shelter for proper listening and the Transfiguration Temper when I want the best. I am led to believe that a good record cleaning regime will prolong cartridge life.
I have the perfect phono stage for the MC2000 - the Vendetta SCP2A. 

As much as I like my XSV4000 cartridge - very even - great bass - very neutral - it really does lack the magic of my two MC's that to my ears simply sing. 

That depends on what you consider magic.  I consider the sound from these great MM cartridges as very magical and RIGHT sounding.

I'm somewhat satisfied with the Ortofon Blue that came with my table.  For a cheap cart it's not bad. Highs are crisp and lows have great balance and punch. It's lacking in the mid range area though. I'm looking at upgrading in the near future and on the short list is the Ortofon Black and the top of the line Audio Technica dual magnet. Don't have part number handy for the AT but it has the same Shibata stylus as the black. 

+1 on the Nagaoka MP200. Smoooooth.