Downunder, I would re-phrase your opening statement: "What the heck, if you can afford to buy the most expensive- why the hell not?" After looking at Thuchan's collection of gear, I can only think that the addition of another megabuck turntable will not stave off boredom for very long.
Thuchan, In my opinion, the factor most responsible for whatever you may not like about your present "sound" is likely to be those speakers, not any of those great turntables. I am not saying this in criticism of the Wilson speakers per se, but I am suggesting that the Wilson's have a certain strong "flavor" that I expect might dominate the sonic signature. I admit this reflects my own personal bias against large, inefficient, low impedance, multi-driver arrays that require lots of amplifier power.