I was thinking that the Jensen caps would be a worthwhile upgrade. The binding posts that I've seen in some recent pics don't appear to be plastic, but who knows? I think that AES may have made some changes over the last few years - possibly upgraded the transformers - as the amps are now rated for 60W vs 50W.
I haven't heard the DJH preamp but I know that some people prefer it over the MK II.
I haven't heard the DJH preamp but I know that some people prefer it over the MK II.