Depending on your budget obviously, there are loads of bargains out there!
Economy wise my 156 v6 is mid 30's on a long run, around town much lower, 20ish.
If money is tight then a V6 probably is not your best bet but what are you comparing it to?
The Alfa V6 is the best v6 in the world, thats why it has lasted so long, pretty much unchanged through the years.
Leather and teledial alloys are a must in my opinion but if you do go the v6 or indeed the TS route then budget for a timing belt kit and water pump change if it has no record!!
I paid £355 for mine and it is virtually mint ,Red with black leather and tele's, poor chap had been told the headgasket had gone by the greenflag brigade, nothing more than the w/pump u/s!!