There is a very fast FP 914 that runs many of the NWR events in packwood, although we haven't seen it out this year yet.
Personally i would stick with FP even without competition. XP is beyond a money pit. The TT could be a really cool car in FP
Oh and there are at least 4 different groups autoxing in Oregon, so you didn't really answer the question very well... Portland, Eugene, Medford, Bend?
So if im the only one, at least ill be #1 lol, ya i think im gonna stay FP for a while at least. you should see me next year