Which Threshold s are best?

The T series of amps were not designed by Nelson Pass. These are amps that were designed after he had sold Threshold. This is NOT to say that they are bad amps, they just aren't of Nelson's "bloodline". The Forte' 4, 5, 6, 7 & 55's were also post-Pass products. Sean
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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.