I am (mainly) a bassist too and I love my pod go.
So far my favorite amp has been svt 4 pro also like that gk rb800 model too, but of course I would love to see more bass amps and more cabs would be nice too!I would love to have some Hartke Hydrive HD cabs and some hartke and ashdown bass heads too.
On the effects side my most used must be obsidian 7000 and some comp which name I dont remember atm (la studio comp?)
I also play little bit guitar and ao far my favorites are 5150 with mesa cab (or with bogren digital IR) Line 6 BadonK, friedman be100 or placater as its called aand litigator