Hi Chris,
These are the lenses I use all the time (ie out of of all the others in my cupboard) for large landscape prints;
21mm Contax Distagon
28mm Elmarit (latest version with built in hood)
35-70 Contax Vario Sonnar
35mm Tilt/shift FD Canon, converted (permanently) to EF
90mm F2 Olympus Macro
58mm/1.4 SLII Voigtlander
The Canon lenses I use are the 135L with 1.4xII and the 90mm TS
I also carry around an 18mm Olympus which is very good, but not as good as the 21mm Distagon. I don't tend to shoot super wide so it doesn't see much action. Nice to have though and it's very small.
Lastly I use a 16mm Distagon fisheye (Rollei not Contax) for spherical panoramas.
The 35-70 Leica has mixed reviews, I know some think it's stellar and others average. I don't know if that's due to different version. The Contax by comparison is universally acclaimed and very well priced. I dropped one on the concrete outside Hampton Ct several years ago, and even though the filter ring was crushed, optically it's as good as it ever was (although it's now been relegated to an emergency backup).
A lot of people like the Canon 14mm II, and others the 14-24 Nikon, but the Nikon needs an adapter that is only available from Mark Welsh (
www.16-9.net) and they are in short supply. You can see many strings discussing it's performance on these fora and the Alt forum on FM.
Regards