Normal lens - Tech IV

Hi.
I would like to buy me a lens for my newly bought Tech IV which came with an 90mm f8 Super Angulon
I'm fairly new to LF and I see there seems to be many choises of lens.
I want to have a normal 135-150mm. The lens must be small enough stay on camera while folded.
I intend to use it for B&W.
What lenses (moderately priced, used?) should I best look for?

Thanks

Moderately priced used, look for any of the modern plasmats, like the 135mm or 150mm Schneider Symmar in various versions, Rodenstock Sironar-N, or their less expensive Caltar branded versions, Caltar II-S (Schneider) and Caltar II-N (Rodenstock). The Schneider 150/4.5 Xenar is also a nice compact, inexpensive lens, good for portraits, but it doesn't have as large an image circle as the plasmats and won't be quite as sharp in the corners.