Blues Jr - custom cab / 2X10 speakers

Hi,

I'm going to be upgrading my cab for my Blues Jr - what I had in mind is, I'd like to go to a dual speaker set up to open things up and move more air, But I don't want to have to lug around an amp that weighs a ton!

 

What I'm thinking is, put 2 tens in it. May lower wattage ones with medium sized magnets  to cut down on weight.

I prefer a more “American” Blues sound – think Tab Benoit or Tommy Castro – rather than a heavy British crunch.

I’m looking at the 10” Veteran 16 Ohm – would this do ok? The amp is 15 watts, would the two 20 watt speaker offer enough headroom where it won’t be breaking up too badly at half or ¾ volume?  Are these efficient enough so I won’t lose too much volume output or is another speaker a better choice ( btw - G10A is out of my budget range )

Thanks for the advice!