s-5 tube kit from Antique Radio Supply?

I have recently built the s-5 tube kit from Antique Radio Supply. It is only $139.00, but I added some modifications to bring the total closer to $220.00. I want to know if anyone else has had the wonderful experience I have enjoyed with this amp. With a Music Hall MMF CD-25 as a direct source and a pair of Audioreview DIY speakers (90db), this amp, at 8 watts, is incredibly quiet and dynamic. It has really floored me, and I have been through much, much pricier gear in my past!