I ran my BARF with a legacy P-80, then a P-70, then a P80SE. By far the best performance was the P-80SE, it was a match made in heaven.
The old P-80 had the slowest spool up time, but the P-70 wasnt far behind.
You could deffintely see an improvement on the SE version, plus it had 6 more lbs of thrust over P-70.