I used to collect vintage machines, but then realized all I was doing was dusting them off because I preferred to actually sew on my Bernina 1230 (which has a foot-controlled needle up/down). Vintage was a phase I enjoyed for a long time. I sold most of my vintage machines to a collector who was just starting out and have never regretted doing so. Not everything is forever, so I say go with the machine that will give you the greatest enjoyment using!
Edit: I would advise keeping the old machine, though, until you are sure you prefer using the new one. Once you are sure, sell the old machine to someone who will value it!