Around 6 weeks ago I got a similiar setup:
Pentax K10D with SMCP-DA 18-55mm f/3.5-5.6 AL
Pentax SMCP-DA 50-200mm f/4-5.6 ED
Pentax SMCP-FA 50mm f/1.4
Impact battery, 300mm manual lens w/ adapter, 2GB Transcend memory (150x)
No regrets whatsoever. The FA50 is wonderful. If I had to change anything I'd consider only getting the FA50 then adding new lenses when the DA*s are available.