Re: who make the best speakers,
My favorites, for my Mesa amps--the EVM is at the top of the list. I have these in my Mark III and Mark IV combos, and in a C-90/EVM Half-Back 412, and an all EVM 412 Half-back. They weigh a ton, handle 200 watts so no real breakup, and they put out exactly what you put into them, without sounding sterile.
Next would be the Celestion Vintage 30. Have these in my Maverick 212, DC-3, and two Mesa cabs, a 212 Horizontal Recto and a 112 Closed Back Wide-Body. Third would be the Mesa/Celestion C-90, in my Mark V Combo. I also have one paired with the Mesa/Eminence MS-12 in a 212 Half-Back cab. This is a good match--the Celestion has the bite and snap; the MS-12 has a smooth midrange like the old JBL D-120s.
A lot of my old Fenders used Jensens, and the Marshall combo I had used a Celestion 85, and I've got one Mesa combo with a Celestion 100.
But all in all, the EVM is "THE BEST."
Bill