Well George, let me just give a few quick opinions here, as I am a huge Blue Circle fan + owner.....
First, as good as the 27pi is (esp for the $$$$), I upgraded to a Pass Labs Xono, then to a Joule OPS1 Mk4 or Mk5 (have to check that one)with matching outboard power supply. Both beat the 27pi. The Pass a little more SS like than I prefer! (though SUPER easy adjustments, and quiet too - the Blue Circle had a better soundstage though)The Joule is as quiet as the Pass, but with more inner detail, better layering and staging than both, big bottomed bass (+ hall info)....so the 27pi I think is the weak link IMHO for your analog system (now if Gilbert is going to build you a crazy Ag based or 200/300 series phono pre, then go for it - I had Gilbert build my amps to be one of a kind BC206 like monoblocks into my BC2's..... sent the Joule OTL's packing)
I have a Basis TT/Vector Arm/Celebration cart, and the Celebration killed with all the above preamps. Like Raul said, SME Sumiko combo is something synergy wise to be heard, with the Basis being very similar to the SME in platform/performance.
Now as far as Cabling, I think the Tg Audio High Purity listed on Audiogon would be killer for your setup. I have Tg High Purity throughout(with Basis Silver Tonearm cabling the only exception), and have through my BC3.1/27pi/Xono to Joule LA150/OPS1 with the Blue Circle amps(or Joule amps), and it has been synergistic from the get go (over Cardas Golden Ref, Kimber 1030/3035, JPS Super2). I would check out that Tg Audio High Purity Din/RCA cable if still available. Killer staging, PRaT, dynamics, hall info, musical/palpable....
Let me just restate that the Celebration has similar pritorities to the Blue Circle sound/presentation. Of course if you go Dyna XV-1s then, hey.... but If you stay with the 27pi then I wouldn't go for better than the Celebration. That is a killer combo IMHO with the SME.