I have an ET10 and like it for my set up. Having a 2x10 made and want a nice smooth (but not too bassy) sound. I was thinking an ET10 with a G10C/S. Would those match well?
For reference, I like my Emi RWB a lot. Nice and balanced with no ice pick (attenuated) highs.
Other candidates are an Emi Lil Buddy + ET10, or even two G10C/S or two ET10s!
The ET10 with a G10C/S will be a VERY dark combo ... so probably not ... the "lil buddy" would also take you a bit over to the dark side.
I actually think you would be very happy with the ET10 paired with a regular G10C!