Which Threshold s are best?

Any word if Jon is still in business, the www.vintageamp.com site has been down for a week now, though I did find an old cached site on google:

http://216.239.41.104/search?q=cache:dthb6U_HCYMJ:www.rsvlonline.net/vintageamp/+jon+soderberg+forte+vintage&hl=en

Sean, I would love to "pick your brain" and see what mods you recommend on the Threshold/Forte line.
Peace,
Todd

I have a THRESHOLD SA/20M power without pre but unfortunatly I dont know anything about it. I would be pleased if you help me to find out the answer of some questions:
1-general information about it.
2-which pre is better to match with this power.

The Best Threshold amps designed are the SA Series amps.
These are Pure Class A Designs. And are the top designs of Nelson Pass.

Here are the top 3 Best Sounding and Quality made Threshold power amps. I have had every Threshold amp in the last 25 years.

1) Threshold SA/1 mono blocks with e mod in balance mode.Also love those Big Analog meters !

2)Threshold SA/4E stereo amp in balance mode.

3)Threshold SA/12E (as you know these amps) in balance mode.

I'll buy your Threshold SA/1's. I own a Threshold SA/4e and love it ! I prefer it over Nelson Pass's new stuff from Pass Labs. Had a Pass X350 and even tried the Pass XA100 and still prefer my Threshold SA/4e / But I am serious Mfslgoldcd, I will buy your Threshold SA/1's if willing to part with.

Lawyerman, I'm very interested in why you still prefer the older SA/4e amp. In what ways do you feel it's better than the newer Pass amp designs?