ok, i have been in the enviable position of having the following combinations on my car:-
1) standard suspension with lowered eibachs
2) this setup with ralliart top mounts
3) DMS with HKS pillow ball front, uprated ralliarts at rear
4) DMS with pillowballs all round.
The top mounts provided considerable improvement over standard, but were not ideal with the dms suspension - the HKS pillowballs were a great improvment - but I REALLY would not recommend them for the road. I was amazed at the improvement at the rear whe nwe changed those...
If you have DMS, their latest rears come with a top mount already, helping rear travel (nice).
If you intend to go on rough terrain, stick to the ralliart top mounts. For flat smooth roads, or circuits ,get cusco or HKS top mounts - but be prepared - they do wear out!