So I am looking for my first real bass head and cab combo and I stumbled along a nice 80's GK 800B. After some research on TB I have seen nothing but absolute praise for this amp. The years on it scare me a little though so I wanted to ask if it would be worth the risk to grab the "classic 800rb" for around $450 or go with a newer GK model (MB500 or 700rbII)? Also, I was looking to match it up with a SWR Goliath III, thoughts on that as well? Thanks!