At 90mm I would reccomend holding out for a super-angulon. You should be able to find an older one for $150 or so. The problem with the 90mm angulon or wide-raptar is that you dont have much coverage.
At 120mm the Angulon is your best bet. The older ones should be available.
The 127mm Ektars, Ysarons (from polaroid cams), raptars and xenars are all Tessar types and will be sharp out to the corners, but wont offer much coverage for movements.
100mm and 135mm wide-field ektars are great but can be over-priced.
At 150mm you have many options. Xenars are pretty easy to find at this length.
But the convertible Symmars are probably the best bang for the buck.