I'm one that I'd repair the bike. But, that is only if one is using "free labor". As mcours2006 said, just about anything on bikes can be repaired. And the costs aren't that bad if one gets good deals on internet parts and does one's own work.

If the front hub is causing vibration, then something must really need long long overdue maintenance with it.

Another option is buying someone else's problem bike, and maybe one would get lucky

If you want a new bike, maybe get something a little different. Road Bike? Cross Bike? Adventure Bike? Touring Bike?

Then take your old Specialized Vita as your maintenance "practice bike". With some luck, you might get the old beater back on the road for your commuter, and keep the new bike for greater adventures.