Sweet,

For starters, look for any Reservoir Jazz CDs Engineered by Jim Anderson and Mastered by Allan Tucker (or even the Rudy Van Gelder Reservoir titles). These discs rival SACD.
http://reservoirmusic.com/new.html
Anything by Diana Krall or Paticia Barber is sonically topnotch as well. 'Modern Cool' is stunning.
http://www.patriciabarber.com/press/downbeat.htm
I'm also consistently impressed by every Eric Alexander http://wc06.allmusic.com/cg/amg.dll?p=amg&sql=11:wcfqxql5ld6e~T2 disc I own. Likewise, everything by One For All http://wc06.allmusic.com/cg/amg.dll?p=amg&sql=11:ajfuxqehldae~T2 .
Criss Cross, Sharp Nine and Venus (albeit a touch loud) all put out excellent sounding jazz discs.

my 2¢
aka