Apex do it for me, a very good reg
ATX50 and ATX40 with DS4's. A DS2 would do for my left post if i only used 1 spg, i use 2 as when i strain my back, which is quite often, i close the manifold and dive the twinset as indies.
DST is good but i moved that to my stage as i like the swivel head on that.
I have Scubapro's on my single tank rig and like them as well, they are the cheaper end of the range, but i prefer the breath off of the Apex
which are also the cheaper end of their range