My knowledge of the GLE (i.e, non-turbo) is limited, but from teh GLE's I have driven I have come to the conclusion that the addition of the turbo and the b230ft makes a NOTICEABLE improvement in both acceleration and power.

You mentioned you really dislike the acceleration of the 200 series; on-ramp running start, lqack of power on uphills, etc. Well, the GLE will be a little better, but maybe not as much as you'd like. The Turbo is MUCH better; I can accelerate from a stop at tiny on-ramps, I accelerate on uphills with little problem, I can quickly accelerate from cruising speed to pass people when necessary, etc.

Basically, at this point a used turbo model won't cost that much more than the GLE, and the money spent is well worth the gains. Just my humble opinion, but I wouldn't buy a non-turbo 700. Of course, as I stated earlier, the turbo is a beast unto itself and adds more parts to the list of things that can go wrong down the road, but as long as you research your purchase to discover the history you should be alright. If the car is around 150k and on its first turbo bring it up to the person your buying from. Turbos (at least the Garrett or Mitsubishi oil cooled models) last about 160k, so he should drop the price anticipating youw ill need to replace it in the near future.

Anyway, all 700s are great regardless, its just a question of personal taste and opinion.

-Rick