Well, I'm not sure whether OP still want suggestions or I'm just bumping the thread but I've something to say. If you are seriously interested in quality alternative of HDWing/CHDbits than you can only count HDTracker http://hdtracker.org/ Best for untouched BD/Remux. HDAccess may help but AHD has their internals that are more focused. Other than that HD-T or Scene HD groups viz; FULLSiZE, iFPD, XORBiTANT, LAZERS , TAPAS, SharpHD, TRUEDEF, CiNEMATiC, CAELUM etc etc.; there are many.