Hi guys, I've been lurking the site for a while now; but I still have some newbie questions that I haven't really seen the answer to.

1. I'm currently looking at 05-06 MCSes, but I've been hearing the justas are "justas" fun to drive. But my first question is: How are the maintenance schedules/costs between the N/A and S? I'm planning on test driving a 06 MC on Friday, and the price/miles/color is really tempting. If it costs substantially less, that could sway me to a N/A.
2. How difficult are vinyl stickers to remove? Most stickers aren't a deal-breaker, but I've seen some really gaudy ones that might be.
3. Has anyone retrofitted the Chronograph package into a car that didn't come with one? I really love how it looks, but it seems to be fairly rare.