I'm new to torrenting but have learnt a lot over the last month. As I am becoming a member of trackers I am seeing lots of internal encoding groups that don't seem to be mentioned as often.

I was just wondering how the likes of Framestor (BeyondHD), HDSpace (HDSpace), MKVRG (HD-MKV) BluEVo (BluEvolution) Beast (ChinaHDTV) & HDManiacs (HD Torrents) stack up against some of the big boys (CtrlHD, CHD, Don, EsiR).

ESiR is no more. All encoders are good (even scene). It's a matter of personal opinion. "The big boys" are reputable and it's less likely to see them fail.