> 20% busy road, 80% bike/walking path

This sounds like my commute. If the bike path is paved and well-maintained, and the road section isn't too bad, you might not have to worry about flats too much and can get away with less protection than Schwalbes. A lighter, better-riding tire would be more conducive to your "go fast, go fast, go fast, go fast" requirement. I use Serfas Seca and Conti Gatorskins, get maybe one or two flat a year (well within my comfort zone for commuting issues).