My Peavey Grinds have a 16mm spacing and 35" scale length.
I like the tight spacing to make the neck less chunky, and because I never use slap it doesn't restrict my technique. I can't dig in as much as I like to with my 4 stringers but it helps me play a bit cleaner!
35" scale length certainly helps keep tension when tuning lower than B, though it can make playing on the lower frets a bit of a stretch if you're going up any more than two frets, so for standard tuning, 34" should be plenty!