my S13 with external gate vented has always treated me well and not annoying. I do use a
3 port EBCS "electric boost control solenoid" to hold the gate completely closed until 12psi though so you don't hear anything from the wastegate until you really put your foot down and make some real boost.
I find with this setup i don't ever hear the external gate until i'm accelerating hard in which case i don't mind the extra sound at all, even enjoy it. (If it were starting to open earlier and make noise during light/medium acceleration i'd get sick of it real fast!)
