Speakers for a 15w 6v6 integrated amp?

Tannoy may want more power and different tube,,,I would lok at single driver full range, no crossover designs.

Omega Super Six Alnico Monitors with Deep Hemp Sub
Omega Super Six Alnico XRS
Both of these will shine with 15w of power if you want to buy used look Omega Super 8 Alnico XRS.
Contact Louis at Omega, he is a great guy and will set you up right.
Rodge

Given your musical taste, I`d give strong thought to the Omega,Tekton or Zu speaker lineup.

The Coincident Technology Triumph Extreme's are amazingly good monitors that are very easy to drive. If you couple them with (put them on top of) the passive woofers that Coincident provides you get an excellent fullrange speaker that is at ideal listening height.

The Devore 3XL is also an easy to drive and very good speaker.

Fritz speakers make some excellent monitors and some full rangers that are very good. They sell direct so you get great bang for the buck, plus "Fritz" is great to talk to and could provide you with excellent advice.

Greg

All good suggestions, above. Here's more:

If you are a vintage horn guy (in my order of preference):
Altec Lansing - Model 19, 14, 17
Klipsch - Khorns, La Scala/Belle, Cornwall, Forte/Quartet

If you are not a horn guy (same order of preference):
Audio Note - AN-E, AN-J, AN-K
Triangle (various models)
Fritz
Devore
Coincident

If you are on a budget or want a cheap way to test HE speakers:
Klipsch KG-4 (horn)
Snell E, J, K (original or /II models)