Used TechDAS Air Force III vs New Feickert Firebird with Kuzma Safir 9 vs SME 20 MK 2

OK. Items I want on a turntable are an isolating suspension, vacuum clamping, a magnetic thrust bearing and a versatile arm I can adjust to the majority of cartridges. In terms of clamping, reflex clamping is a second best and a good standard thrust bearing is tolerable. The other traits can not be compromised. 

The Air Force Three is a complicated used turntable with a second rate arm. I would not even look at it. The Firebird and Kuzma R do not have suspensions so you would have to spend an additional $5K on a MinusK platform. 

The Ref 2 and SME 20 are very similar tables. Both have a suspension and both utilize reflex clamping. The Safir regardless of anything anybody including Frank Kuzma says is viable for very low compliance cartridges only. It is otherwise well designed. If you are going to spend the rest of your like with a Koetsu, fine. Otherwise you need to look elsewhere. The Reed 2G, Tri Planar, 4 Point 9, SME V and Schroder CB are all excellent arms. I went with the Schroder as did Mark Dohmann. He demonstrates his Helix turntables with a CB. 

Of your selections I would get the SME and put a Schroder CB on it. My next choice would be a 4 Point 9. The Safir is Frank Kuzma doing his "just because I can" act. 

A Sota Cosmos offers Vacuum clamping, a great suspension, a magnetic thrust bearing and the CB fits perfectly. On top of this you get state of the art speed control and a great isolated hinged dust cover you can use during play.  Just an FYI

An individual who I meet a few times throughout a year, has a passion for Reed and Glanz Tonearms.

This same person, is the supplier of the Glanz 12" TA, I regularly encounter in use.

The owner of the Glanz 12", had a selection of TA's available when making their assessments for a shortlist/purchase. My SME IV was a loaned item to be tried and when used it was discounted as a result of the impression it made. The (not word for word) recollection of the description given for the deselection was its a typical SME presentation, and does not create an attraction like a few of the others TA's are able to generate.  

The Reed 2G and Glanz TA's both have removable Head Shells as part of their design. The Reed 2G also has a reasonable price attached to it.

@chauncey 

I thought Soundings in Denver was a TechDAS dealer. I think they  had one in the store the last time I was there. 

I think The Audio Salon, new distributor, is going through all existing dealers and deciding who is keeping their dealership with TechDAS.  

http://www.soundingshifi.com/brands/

I demo'd a TechDas V in my system for a month and really enjoyed every minute.  Being a fan of the Kuzma 4P9, I ended up going for a Kuzma Stabi R with two arm "wings".  NO regrets!  This table has excellent speed stability and weight.  Translates to great dynamics and drama.  Very enjoyable.

I don't really miss the the vacuum hold down offered by the TechDas (sonically) but that and the air bearing are clear technical advantages of the TechDas over the Stabi R.  I used a Vibraplane for both tables.  Some vibration isolation should be part of your table budget unless you go for the SME.