I think 1st gear is worth at least a 6000rpm run (when is fuel cut on the 2.5 liter?)....maybe it's just me, and my huge-ass 265/35/18 wide pilot sports, but between the power output, the medium-ish gearing of the 5-speeds, and those tires....well, I definitely feel that first gear redline is not an OVER-RUN of power output.
Anyway, I don't like to redline in first unless I'm racing someone (which is extremely infrequent). I don't like the forces it puts on the juicy bits, and I don't like it's feel as much as I enjoy a good 2-4th gear redline run.
Good to hear others opinions. I come from driving a 2006 Civic SI, which I redlined at 8000 rpms everyday and have never been concerned about. Conversely, my 2008 Legacy GT is not a car that enjoys redlining.
I find the boxster to be not as encouraging of redline as the Civic SI, but also far smoother power delivery. Since the car has a long history of being tracked for many miles without any sort of rotating assembly failures, I assumed it was a great car to keep in the upper rpms (in terms of mechanical happiness).
I like being re-assured
Joe
P.s. First full tank of gas in the boxster, driven 70% highway with the top-down, lots of aggressive driving.....23 mpg. Sound about right? Also is 11 years old without a 60k mile service yet, which may help.