You could run up to 50-60% using a -1 Hilborn or Enderle pump. Of course, nozzles and pill size change as you increase, but it would work just fine for your needs up to 60% or so.
I'd start with .038" or .040" nozzles at 30-35%. Be sure they are flow matched! You'll want nozzles that flow approximately .400 GPM @ 100 PSI @ .792.
I'd suggest around 11.5:1 or so for a compression ratio.
Have fun!
Spud