Looking for a bench type buffer. Was looking at the Grizzly H4380 http://www.grizzly.com/products/h4380 and it has a 3.5 amp motor for $79.99. Got to looking at www.Harborfreight.com at item 94398 at 4 amps ($49.99) and item 40668 at 8 amps ($59.99). More amps = more power right? So is the Grizzly going to be that much better with the lowest amps or should I go HF? What am I missing?