Jim Salk has a long and great history... I would love to have a pair of his higher-end models, may even try out his actives someday. Putting costs aside is really dangerous as it applies to passives... beyond say $5K/pair I'd say the differences start becoming
almost entirely aesthetic. In reality, cost and available space are probably the biggest variables in speakers... the other compromises in design will be much smaller. If you told any great speaker designer size and cost don't matter - they'd (almost without exception IMO) deliver something that was the size of a refridgerator, weighing 300lbs+, and with a component cost of $10K at least.
That said, a straight answer - audition to see if you like them of course:
Commercial/Retail/Pro:
Revel - any of them in the 3 highest brackets
JBL 7 series monitors (just go active... but they have passives if you want - they require active xover however).
RBH SV-6500R
KEF R900
...Go to dealers and try several out...
Internet Direct:
Polk Audio LSiM line (707's are half price right now) - they are in stores, but also direct so put them here.
Ascend Acoustics Sierra Tower with the RAAL option
Salk Sound (I assume you've already researched)
What I have, and am mostly happy with despite them being dirt cheap (relatively):
Aperion Grand Verus Towers in one system, and Polk Audio LSiM bookshelves in my office.
Everything else I have are active monitors (or speakers which I would
not recommend to anyone else).
But seriously, it is a bit like asking which car to buy... even if you specify "sports car" - there's way too many possibilities, and the differences are ~70% subjective determinations. All of the above measure well for the most part, but ever speaker has some compromises baked in... some might really bug you and others might not even matter. Only you can tell which is which.