The BA is the new guy and I am one of the slow types to determine preferences so it is not in the mix at present. Plus it is not balanced yet so that could definitely throw a monkey in the wrench.
They are K340ish in their amp dependence but as of now the amp(s) that I prefer for each is not the same. i.e. I prefer the GSX (SE or balanced) over the AA for the K340 but just the opposite with the LCD-1 (only SE right now). The new guy hasn't been here long enough for a non ipodbj opinion.
I doubt that the foam will have a really large effect on the overall sound. We should have tried it on the TTVJ Fet-A, but a goodly portion of any logic I may have had during the "meet" was washed out in my Glencairn glass. I like it better out of the AA HPA v.1.0 compared to the GSX. The TTVJ and AA have a very similar sound signature based on the short time I compared them at the "We Haz no Joe Grado" meet.
I personally have no problem with the fit of the phones but some people cannot get them to fit tight enough or without large gaps between the pads and their head which may cause problems similar to having a poor fit with the O2's. I guess I just have the next size up chosen-one head.
I liked the SS302 and I liked Amarra, even though I tried hard not to like either one. I could hear differences between Amarra on and off, but these were definitely not even single-blind as I had not drunk enough at that time. I see change in the future
The HD800 sounded excellent out of Ari's balanced amp. I think I am becoming more and more a tube guy.
The JH-13 sounded OK
Drove to airport, waited for plane that was late, flew, missed connecting flight, waited and drank at airport, flew some more, drove a little more, stayed up way to late drinking and talking. Why am I up now?