Who does complete retubes? Only replace tubes when they go bad. At most, you should only need to replace 3 power tubes to keep matching if one goes bad. You can save a buttload of money by not buying into the full retube.
BTW, the bad years for SVT's were 2007-2008 when they were made in Vietnam. But the ones that work are good heads, and the vast majority of them have been fixed under warranty by now.
I personally have enjoyed using any SVT head no matter when it was made, as long as it worked. Folks like to argue the subtleties of the designs they use now as opposed to back then, but in practice, I really don't think there's much tonal difference at all between the ones being made today and the ones made 44 years ago, one of which I have. That goes for all of them, including the CL and 2 Pros, which are separate gain/master as opposed to the single knob volume in the VR and vintage heads. 810 cabs, there's more of a difference, with the Heritages and original Flatbacks of 1969-73 being the very best sounding they've ever made, the rest being really good but not quite Flatback/Heritage good, and a bum period between 2000-06 where the speakers in 810e's didn't have enough highs. But the heads just don't sound very different to me, and I've played them all many times.