Matt:
I have a "G" and really like it. The seats do sit a bit higher. I noticed this in my transition from a later 150 and a 152 both of which I rented during my training. Despite a miserable, and flat, re-upholstery job, I noticed I sat higher in the G.
Since then I have re-upholstered with help from Shelby Isham, and I left in the webbing over the springs. Now I sit REALLY high. I like the higher position, though the thicker upholstery causes some difficulty for my taller passengers. I am 5'9" and have short legs.
I think the G model panel is the best of the lot. I don't like the rounded panel simply because there seems to be little logic to the placement of the instruments. The G panel is a T configuration, but seems to be smaller and lower than later panels. I also detest Cessna's attempt at color coordination in the later panels. The overlays on the G panel are all black. Though I have removed the right and left plastic overlays on my panel (see 46juliet.blogspot.com).
I also like the flat landing gear. It seems my landings improved when I slid into the G, though the higher seat position might have had something to do with that, too.
Having said all that, I would heed the advice to examine the individual airplane rather than get stuck on particular model years. A well-maintained, solid airplane that is not quite within your model year specs is better than something not so well maintained. Remember, you are purchasing an elderly machine and overall condition should be a bigger consideration than individual characteristics. Unless, of course, you plan to do a major refurbishment.
Reg