IMO it is best to use the 8', 2 lamp, high-output, strip fixtures with a -20 degree ballast. This will be a reliable, efficient unit for any shop space and the -20 ballast will ensure that they don't flicker or make a lot of noise when it is cold outside.
They are about $80 each 8' fixture without lamps. Lamps are about $12 each. Depending on the manufacturer.
You will probably want to use two runs consisting of three strips end-to-end parallel with your 30" wall, the two runs spaced about 13" apart to get the best light spread. Does that make sense?
Use the 3500K lamps for the best color rendering.
You can get the standard 8' strips at Home Depot or Lowes for about $30 each less lamps. They will do fine as far as light, but the ballasts may have a tendancy to fail in some conditions (cold, dust, etc.).
I do project management for lighting for an electrical distributor... I do this all day, so if you have more questions just ask...