Best glasspack to run?

Why not run a full exhaust with cutouts if you want the option of open headers. I don't think most people would enjoy you running around with open headers, and I don't know why you would like that on the street yourself. There is no reason to be running around open headers on the street.

You know how they are enacting very oppressive exhaust laws in places like NYS?

I'm no bootlicker, johnny lawmaker lover either. I'm more of a f' the police guy myself and I don't like them breathing down my neck with their revenue creating business of promotion based ticket writing

Personally, I run full length 3" pipes with an H-pipe and XR-1 mufflers (round, straight through)
It was fun when we were kids.