For me it's about a 65/35 ratio of importance - grip/longevity.
I also only drive about 4k a year - so I want a tire that will grip wet or dry and hopefully last over a year. Problem for me is I never hear of the grippy Dunlop/Bridgestone stuff lasting for more than around 3-4k. Seems like most people who get them say something like "good grip, not great - didn't last long enough - will try something else next time."
Pirelli Stradas or Metzeler Roadtecs probably rival the 208's grip - for mere mortals like me anyway - but will last twice as long. I could probably get 2 full years on one of them.
And as you noted - the Pilot Powers have better grip than the 208's and will probably last at least as long. My Shinko 005's will probably grip 90% as good as the 208s - and last twice as long from what I've heard from other owners... and they were $150 a pair including shipping.
Tread design and compounds are not all created equal. I believe the european tire mfrs lead the way in both categories.
To each his own, however. Just my $.02