NEED TO REPLACE OLD FAITHFUL- WHICH AMP. SHOUD I CHOOSE

As a matter of self interest I have a AGD Tempo for sale at The Music Room for $3850,.

Otherwise you should really try the Carver Crimson 275 and switch the tubes to Psvane KT88s and 12AX7 (Chinese, I know) if you like it with the stock TungSol KT 120s.  Ignore the naysayers on this amp!  You owe yourself a listen.

Also, recently came across the very cheap Micca 14ga speaker wire.  It will surprise you also.  Liked a single set and doubled it up to get even better results.

@johnread57: How do you compare the Pass amps to the Krell in terms of differences and similarities? 

paragon audio fixed mine after arc said they did not want to mess w/it!

All of those amps you listed are middle of the road. Look into a 30 grand Pilium integrated since I don’t trust whatever preamp you are hooking it up to either since audio research is entry level hifi and the later preamps I heard sounded like kind of bad! It is called the Odysseus. You can hear them in NY. I would also suggest a pair of new speakers since Dali is kind of bright.

YG acoustics Carmel 2 is good and easy to place in a room. Magic A5 also a fine entry level speaker. Another good one is an Amphion Krypton3 that are easy to place in a room like YG. Magico needs a little more room. From what I am reading you need to start over.

Right now my D400 is in the shop, and I am waiting to rear back from them next week. They  said it sounded like output transistors, but said now might be a good time to re-cap too. He was confident that he could get all the parts needed to do the repair. The shop has been in business for over 40 years and I have used them before, and trust them. I will keep everyone posted on what happens.

In the meantime I am still shopping for a new amp.