Best Aftermarket Suspension Set-up

Ok so I'm looking for opinions on aftermarket tubular k-member set-ups. A little background on what I'm working with.
1968 Dart 560hp 499ci low deck. 727 TF, 3:91s, Mini tubbed, frame ties. If you've been on this site for a while the name John Dillenger may ring a bell. he engineered a homemade setup to eliminate t-bars with coilovers etc. I installed years ago and am looking to replace it with more scienced out setup.
QA1, Hemi Denny, RMS, AJE. What do you like what don't you like?