Think this trade would be good?

Quicksilvers

You must drive you’re a lot as you obviously want a Z with less mileage. With doing all your general maintenance our 370Z’s will last a long time to come. In the end it’s up to what vehicle you would like to purchase. The 7AT and 6MT both have there pros and cons just depends what drivetrain you feel most comfortable driving. You could always repaint this 6MT 370Z you like Monterey Blue if it is in your budget or save to repaint it. Over time the seats and stereo could be upgraded if that is the direction you want to go with this Z you are considering to purchase. Overall the base 370Z brakes do just fine for street duty. If you do ever do plan on attending any track events with your Z definitely upgrade your brakes before hand. I agree the color Monterey Blue is one beautiful color on the Z but sometimes it’s necessary to expand your horizons to a different color on your Z or hold out and keep searching.