I researched this myself not too long ago. Found that the main studios had basically two mics a U87 and a MKH-416. Pre's were naturally clean. Grace, Hardy, Millennia, Avalon.
I have both the MKH-416 and the U87 and went with the Avalon M5 pre. Compressor wise, used mainly just for imaging, I found a Urei LA4 at Vintage King. Next just gotta get that Rosetta 200 with firewire.
What I found was keep it clean. If you do any ISDN session's that's how they'll want it, of course you probably knew that. It'll be a great setup regardless of what you pick, good stuff!