Heresy follows: for 6x4.5 and 6x6, I'm now using an Anastar lens (still in Flash Kodamatic shutter, B, T, and 2-300 -- left open in T) from a Kodak Reflex II TLR. Four elements, four groups, coated, f/3.5-f/22, and click stops on the aperture. The prints look really good at 8x8 and cropped to 8x10, though I haven't gone much bigger than minimum crop for 8x10 yet. Price was right, too -- you can buy these cameras with sticky shutters, floppy viewing mirrors, or other failures for under $20. However -- PLEASE don't hack up a good camera that just needs a shutter cleaning; use it to make your images instead (excellent cameras, and though they're 620, they'll accept a trimmed 120 supply spool).
For 6x9 and larger, I use the same 135 mm Vivitar VHE (f/5.6-f/45, 6 element similar to Componon-S) that I use for 4x5, at least until I find a suitable 100-105 mm lens. *Killer* glass, and it came with my enlarger...