Hi FlyBy,
I'm a FAA Comm/IR/Multi CFI like you working on JAA conversion.
I would suggest Oxford, Bristol or Aft. I just finished my ATPL exams with AFT(Atlantic Flight Training) distance learning from California. It took me 7 months. Their price 1,795 is very competitive and the brush-up sessions really good. They only have a weakness in Perf but the rest is really good.
I agree with you on Oxford, they are arrogant and never call back. Bristol has a great CD-ROM package but AFT has more flying experience since they are Airline owned.
Anyway,
goodluck and let me know if I can help.