Time Warp..... Yes, fairly stiff and very heavy, and I can imagine it giving most preamps some serious stability issues especially on spike footers.
OP, if you are still out there, whatever did you decide? Since I had the 4s and the 2s for my amps and preamps I decided to try the 4 on the preamp (with a 4 on the amp as well) - could not hear any significant difference versus the 2 on the preamp, nothing I could consistently recognize on the sound signature.
While I have spent some money over the years on PCs and a RSA Conditioner, the effects of PCs on my gear has been, let's say, subtle. IC and speaker cables? Less so. Speaker placement and room treatments - in your face differences.