Limo, you want an amp that can drive your speakers. If they go down to 1 ohm and are very inefficient you do not want to get a 3 watt SET amp.
You will need a solid state bruiser for that. If they are very efficient horn speakers like Klipsh Heresy's then you can use just about anything. Then if you prefer the sound of tubes go for it. Then there is how loud you like to play. More volume means more power. Again, how much depends on the efficiency of your speakers. Then of course there is the issue of how much you want to spend.
You will need a solid state bruiser for that. If they are very efficient horn speakers like Klipsh Heresy's then you can use just about anything. Then if you prefer the sound of tubes go for it. Then there is how loud you like to play. More volume means more power. Again, how much depends on the efficiency of your speakers. Then of course there is the issue of how much you want to spend.