Yeah, true about the 19s potentially not riding as nice as 18s. Went out on Cars.com yesterday for kicks looking at 760s and 750iLs. There are some really good deals on '08 750iLs out there, low $40ks. 750s with the 4.8 litre engines and I guess '09s started with the 4.4 twin turbos. The 760s are considerably higher on the new cars and I'd be wary of them in earlier years due to maintenance costs and those cars had the I Drives with the bad rap.

If I ever went for one I'd want to stay away from the earlier generation of I Drives from the sound of it. Next I want to investigate those systems and understand which years came with what generations. The press has been pretty positive about the most recent I Drive.