[s73v3r]

I would have to ask why you have 120+ projects. That's likely your problem; you're doing far too much within one solution.

[lenkite]

120 is not that high. If you have fine-granular modules for re-use across multiple product lines, you need lots of projects. Yes, one can create several solutions for each line, but many times one needs to load all the projects especially feature teams that touch a little-bit everywhere.