My favorite speaker combo (this month ) is the Celestion G12H30 and the Vintage 30 together in a 2X12 cab (I actually have a G12H30 and a WGS Veteran 30).

Tight bottom; warm, punchy mids; smooth highs. Funny, but to me the highs with the Vintage 30 alone sound a little harsh or shrill. I don't hear that with the WGS Veteran 30, and in combination with the Celestion G12H30 it's really balanced.

That is a great video demo. Only place I've ever heard each speaker in rapid succession with the exact same riff played over and over. Good stuff!