Greg does a great job, I have no problems buying from SS and have never had any issues with them. (I am local to them, fyi, but enough about that)
I had/have a Lipp Boss Sr. turbo and I loved the hell out of it. It was pricey for sure, but it suited what I wanted it to do and I had zero problems fitting it. One thing I would say if you're thinking about it, is NOT to use a divorced downpipe- mine did not play well with the Boss, but once we swapped a bellmouth style DP on it worked well. The really nice thing was that Comp turbo (turbo manufacturer for Lipp Boss) offers T-4 exhast housings so if you even want to g to T-4, you can just order a $250 housng ad pop it onto a T-4 manifold!
The Jr line has been discontinued due to lower sales and Comp turbo not offering the smaller turbine wheel option that Greg liked anymore.