RE: What 10" and 12" Combo for Silverface Vibrolux Reverb

I want to try a 10 and 12 combo in my vibrolux reverb.  How would I go about matching a 10 and 12 using the information you supply about each speaker?  Is there a 10, 12 combination that you would recommend?

Yea, in that amp, (I've got a blackface) I'd go with a G12C/S & a G10C (not smooth.  Should sound HUGE ... but still with a good Fender sparkle.