I am looking at buying a jointer. I have read many comments on 6" vs 8" ,helical head vs knife, and fit and finished on the various brands out there. I found a Powermatic mod. 60B which has a knife head and is a floor model. I think I am getting a good price $1499.00 and was woundering if I should go ahead and buy it or wait and get the newer model with the helical cutter head. I would appreciate any input/advice you can give me.