Which Threshold s are best?

Greatb to see this thread keep on keepin' on.Would like to know about mods or basic service if anybody has the tip there.Obviously the build quality was there in fisrt place (unlike Adcom who justI think were too big a company to keep quality control reasonable with their (excellent) NP designed "Gold Badge Series".Might have kept the rack if Adcom with it's swell head reviews of it's 41K D/A processor got cute and had a digital INPUT with no output for the CD player.Otherwise a nice inexpensive balanced stack but while i sold them so contatcs for pre go all the time and small issues come up.Nakamichi's 7 and 5 series stuff still seems to be working 20 years down the line.But with the quality and price of the "real" Stasis gear one would want to knwo if any can't be repaired for lack of parts and even if not the case who to send them to.Leads?Still may end up with a Sonic Frontiers pre and Threshold yet though as time goe on with good digital like Bel Canto and PS Audio and companies like Plinius,Nuforce,and current darling Parasound are out there.Not to mention high quality hybrids like Pathos and Unico though these maybe the bedroom set and not worthy of comparison with large hi-current amps.Choices like freedom can be a bitch but you'd rather have them than not.But repair and upkeep tips fopr anybody still reading post would be appreciated.
Thanks
Chazz

Lawyerman I agree with you on the Threshold SA/4e amp. By the way I will be selling some of my personal Threshold gear to downsize a bit.

Including Threshold SA/4e and Threshold SA/1's if interested.

mrchips i own a threshold sa/3.9e amp. Can you tell me how this amp fits into the threshold family. The rest of my gear fet/10, dac1/e. I'm looking now at upgrading my speakers. Polk SL70 is what i have now.

Also if i was looking to purchase the sa/1's what would be a fair market price. Thanks for sharing your knowledge on threshold.
Tmoon

I believe everyone on this thread would be in total agreement that Mr. Nelson Pass has to be one of the greatest designers in the history of modern high end audio.

I now power my bi-amped system with a pair of Pass Labs XA-100 monoblocks and a pair of Threshold SA-1 monoblocks. I do believe that both pairs of amps are the best sounding designs in either the history of Threshold or Pass Labs. I used to have a pair of Pass Labs Aleph 1's, which are a classic design also, but believe the new XA amps have surpassed the sonic performance of the Aleph and SA series amps.

Unlike Lawyerman, I find the XA-100's to be a better sounding amp then my SA-1's in my system, however they are both great and its amazing that the SA-1's are still almost as good as any SS amps on todays market considering that that they are twenty years old!

Can someone tell me how much of an upgrade a SA/4e would be from an 6.9e? I know there would be some power difference but how much difference in sound if any?