10T "Synergy" also has lesser value than other Masters, and takes less investment to set up. Their models are independently pretty awesome. Pick a Master, expand primarily with 10T models, then pick up the other Master's box sets. You might have to pick up a single out of faction blister for a 10T Master. The should take care of you for most things. Just because you -can- hire a lot out of faction doesn't mean you -need- to.
---------- Post added at 02:10 PM ---------- Previous post was at 02:08 PM ----------
Oh, one thing the 10T do kind of miss is that sense of buying all the box sets and having that sense of great variety for all your Masters. In Rezzers, if you buy the Nicodem / Seamus / McMourning boxes, then you have a fantastic selection of models for all of them. In 10T, less so.
That said, Mei Fang + Misaki are really good on that front.