best commercially available Clarke mixes are FUSE presents and the Electro Boogie series by far. World Service 1 is good but not gotten round to checking out World Service 2.

Best ever techno mix is Claude Young Dj Kicks closely followed by Liquid Rooms i'd say

worst, well, i cant really remember coming across any really awful commercial mixes, of course mixes with magazines are always going to be woeful, with the odd exception popping up now and then. The old mixmag series was classic