I drive a 7AT and it is great, If you put it in the manual mode that is. Certain days I would be too tired at the end of the day and put it in D. Going downhill and breaking would sometimes cause downshift blips. Scares the crap out of the pedestrians trying to cross the street. Double downshift has some lag if your cruising on the highway and want to have some fun, not too bad to be a complaint issue though. The only rattle I've encountered only happened after I got my HFC + exhaust mods ~1.5k-2.5k RPM range. Road noise is going to be louder than your G I would assume due to that the G leans more towards the "luxury" side and thus would have more sound dampening. the 370 is a sports coupe after all and the noise is part of the fun. If you do get the 370z, get an exhaust mod. The stock exhaust makes many of us sad
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2010-PW-370z Fast Intentions CBE 18" res + HFC, K&N Typhoons Intakes(Gen 3 Stillen soon), 20mm H&R Front - 25mm H&R Back, Shine Auto(Sunline)