OP, here is my $400 shot at getting this done. Keep your current amplifier. Find a used Ampeg 410HLF - they are everywhere and affordable. Get a decent high pass filter - the FDeck one is a great budget option.
Any head with a decent power rating will be fine.
Hell - [Invalid or Expired Link Removed] that will rock your lowness all night long.
Any head with a decent power rating will be fine.
Hell - [Invalid or Expired Link Removed] that will rock your lowness all night long.