I know this isn't Gearslutz, but I gotta tell ya, if you like both amps, buy both amps. Figure out how to make it fly with your wife.
They're not going to get any cheaper in your lifetime. The price will only go up.
I bought my 1961 B15N for under $500 a few years ago.
I bought my 1969 SVT head for $500 a few years ago.
Is this all becoming clear to you now? AFAIK, the '69 Blue Line SVT is worth at least $2500 now. The '61 B15 is worth more than $1500 now.
They'll never get any cheaper, and if you don't get it now, you either end up with a lifetime of regret or you'll pay even more later.
Or you could quit music and recording altogether and listen to MP3's on little plastic boxes.