Use the fostex FE166 in a BLH or Abby design. Dirvers are about 140/pr and wood for BLH cabinet is about $130 ( I think I used 2 maybe 3 4x8 sheets of 3/4" birch. I loved my Fi X with 45 tube with them. You also might be able to snag Klipsh cornwalls for 500 - 600 if you can afford that.
Good luck
Good luck