If I were buying off the rack today, I would be choosing among the Victoria Cadenza or Ad Libitum, the Vignoni 15PSX, and the Mengascini FC125 or Bajan.
I am a fan of wood finish vs. celluloid - I would swear it sounds better as well as looking better, but I can't prove it. That is one minus for all the Russian makers; as far as I know they don't offer it.
If I bought one with 61 notes I would want the missing notes taken off the top, not the bottom. This is probably a custom request - the usual range is G2/G7 for 61 notes and E2/G7 for 64. I might even consider asking for the right hand to start from C2 so that I had a choice of in- or out-of-cassotto sound for the lowest notes of the cello and bass clarinet, though presumably this would mean the loss of the bottom 4 notes of L register.
I have heard some very fine smaller Scandallis, so I probably ought to investigate the whole Scandalli BJC 442/453/462/473 range - but I haven't yet. I have no gripe with Bugari, other than the price tag. Conspicuously absent from my list is Pigini, which just doesn't sound right to me.