I assume you are talking about a sailing regatta?

Yes

If so you really
need more than GPS data for a comprehensive analysis. I'd also want
wind speed, wind angle, boat heading and boat speed through the water
just for starters. All of that can be logged out and replayed using
some of the more sophisticated instrumentation systems, and you can
use it to cerate your own polar diagrams, target speed charts, etc.

Obviously you're right.
It's just a money issue.
I'm taking a step at a time: GPS first, relative wind as a second step

That said, if you really just want GPS data, Maptech Offshore
Navigator does a good job with track logs. You'll have to do the
analysis yourself however.

Hope it would not be the usual tracking SW. There are alot not so useful for
the deal.
GarTrack (even if I don't like it) could import GPS data (just if I could
have the right file format) and then it let me enter wind data manually.
So not a great thing but I could be enough as a fice step