Having only had one tube amp before (AN Kit1), I find it hard to choose between the different valves.

They will be used with either Oris style fronthorns or Coral based backloaded horn.

What do you guys think ? or is there even more contenders in this price range ?

FSAudio is a dealer for the Stoetkit, and they used to be a sponsor of ART. They aren't sponsors anymore, but ART still archives the posts (by permission). Here are some posts I made in the FSAudio forum about the Stoetkit:

• An evening with the Stoetkit
  
• Stoetkit Build Process Write-up

I can say that the Stoetkit jr is a very nice sounding amplifier.
I had the opportunity to hear it through Waynes 7 Pi speakers, it blew away the 2A3 SET by Doc B. I have not heard the WAD Kel48 amplifier that you have mentioned, so I cannot comment on it.

Here is another option that may work out for you.
It uses the 45 output tube in a SET configuration.
My experience with 45 tiodes as an output tubes, almost always outperforms any other output tube that I have heard in the sense of realism. The main drawback, is that it only produces about 2 watts of output. But, with the speakers that you have mentioned, it will perform well. And most of all, it will play music.

Check out this circuit board offering and see if it is a possibility for you to build from the ground up? The main work will go into a chassis. And you can have one made up at a reasonable cost.
I figure this whole project would not cost more than $500 when using quality parts and buying good NOS or used tubes off of ePay.

Good luck in your search.

Norris Wilson

• http://www.tubelab.com/TubelabSE.htm