WP MultiSite/Buddypress Hosting Recomendation

Is their a review of hosting companies who offer buddyPress multi install VMS/Cloud based managed hosting. Shared hosting doesn't cut it and having bad support issues with a a WP specific host who doesn't seem to support BuddyPress or multiuser WP sites very well. Looking for a host who can accommodate our SaaS products with the ability to be flexible and grow as we need more power and bandwidth.

Appreciate any suggestion or experiences with other users here.

So far I am looking at Media Temples Virtual Hosting products .

Thanks!
Mark