If you'd like to experience a traditional tube sound, and if cost is truly no object, the VAC Phi Beta would be an insteresting option, at almost $20k (!). I have owned VAC gear in the past and actually considered this when putting together my current, cost no object system. Of course if $20k is too much, the VAC Avatar Super features some of the same technology, but at about 1/4 the price.
Vac Phi Beta
Vac Phi Beta