Recommendations for Mechanical Work?

[MacGrad]

I just recently purchased a base 2002 Boxster with about 56K miles, and I'm getting some mechanical work done on it that was identified during the PPI.

At the moment, it's primarily smaller stuff -- engine coils and tubes, chain guides -- and I'm looking into an IMS retrofit (either the ceramic replacement or the TechnoDOF).

However, are there other items I should be getting checked / replaced at this mileage that may / may not be noticed during the PPI? I've seen comments about replacing the AOS, the engine mounts, etc., so I'm trying to compile a list of items that I should keep an eye on.