Sorry I cant comment on the manual trans or used purchase I opted for 7AT because I do a lot of road trips.
That being said, I bought my 2010 brand new back in July '10, have done minor engine mods, always run full synthetic, and drove it across country 3 times. No outrageous issues to report from me.
When it comes to reliability, the Z has been spot on. No ridiculous breakdowns, no obnoxious smells, and it holds its ground in extreme weather. From the Oregon forests, to the Arizona desert, to the West Virginia hills and to the snow-frozen North Dakota plains, the 370Z has been like an uninjured first string QB for me. FTW.
__________________
 You want a motorcycle, but can't drive a manual? Please tell me you're joking...
|