I think that it is best to have compatible turbine/airframe combination. 12lbs turbine is definitely not a "temporary phenomenon" and it is in a class of its own. You don't need the extra weight of the larger turbine in the smaller airframe.

Smaller sized jet will definitely has lower accessories cost and will be more compact to transport. Overall cost to finish the jet will be lower and I think that it is the compact-sized that really attract modeler in the 12lbs class turbine.

Airframes available for the 12lbs class turbine are increasingly available and we will definitely see more of these high performance jets flying around in no time.

PST J600 and TJT 3000 are flying world-wide and just in the USA that they are awaiting AMA approval before formal distribution.

Keep flying!
B777
www.pstjets.com
www.tjt.bz