Vintage? You bet!! I started using vintage speakers when first infected with this hobby because it was all I could afford. I've now spent more on upgrading vintage monitors than I would have spent on a "great" modern speaker but I bet you can guess which gets my hair to stand up! ;-)
Vintage monitors (good ones like Altecs) compete with the best current offerings and when carefully tweaked they simply BLOW AWAY most of the best current offerings. The only downside is a loss of imaging. They can image, but they don't make you duck and hide from overhead sources like some speakers can do.
It's really about the drivers. I have had great luck with vintage Altecs and JBLs placed into upgraded cabinets (thick MDF with better fill, bracing, and joinery) while keeping with the same internal dimensions (volume) of the originals. Put some sort of anti-vibration adhesive coverings on metal horns, update all cones and diaphragms with OEM factory originals (where available), put modern terminals and wiring in the enclosures and stand back.
There is nothing like a great modern day tube amp pairied with a vintage Altec two way monitor.
