Hi again Victor.
As far as the alternator versus generator (to build on what Brian said), our previous airplane was a 172G. It had dual NAVCOM's, audio panel, Loran, rotating beacon and belly beacon, and lights. When idling, the generator had a hard time putting out enough power for the low voltage light to go out. Our 150 has an alternator and puts out ample power at idle. That's the biggest difference I noticed. As far as being a deal killer if it has a generator, I would say no. I think most folks would opt for an alternator all else being equal.
