just read in the paper today that petrol prices have broken £1.00 per litre for the first time in Scotland. (In the Western Isles).
Holy moly!
I'd like to second what others have said about Glasgow -- I recently returned home to Chicago, but I lived there for the past 9 months and found it very friendly, easy to navigate, and loaded with things to do (e.g. great shopping, restaurants, cinemas, pubs). I lived in the Pollokshields area, which can have some dodgy bits, but on the whole, I found it to be very safe and convenient for accessing the City Centre. I do have to say I prefer it to Edinburgh (sorry!) because it has a more "down-to-earth" feel, much like I was accustomed to in Chicago.
Parking in the City Centre can be extortionate (₤3.60 every 2 hours for street parking, or roughly ₤8.00 a day for one of the parking garages) but luckily, public transport is very reliable and affordable. Also, all of the streets are one-ways, so that will take a bit of getting used to if you're driving there. What's nice, though, is that everything in the City Centre is within walking distance, and as others have said, it's impossible to get hopelessly lost because of that grid system.
I also lived in the Stirling/Bridge of Allan area for a year, and while it was very clean and picturesque, I felt that aside from historic attractions, there wasn't a lot to do there. They do have a pretty nice shopping centre, good public transportation, and a few nice pubs and restaurants, but being a city girl, I felt it was far too quiet for me, if not a bit isolated. It's great if you like that sort of thing, but I missed the hustle and bustle of urban life. I found Glasgow to be a much better fit.
The nice thing about Scotland is that you can jump on a bus or a train, and be someplace else within an hour or less, so you can experience both country and city life whenever you wish. There's also loads of majestic places up North where you can go for a long weekend mini-break and escape for a wee while. I was able to see so much of the country while I lived there, which was fantastic.
If you haven't already been, I'd suggest making a visit and checking some places out to see what feels like the best possible fit for you. I don't think it's possible to really visualise living in a place until you've experienced it first-hand and gotten a good vibe from it. I think if I'd had more time to spend in Stirling before I stayed there, I probably would have chosen Glasgow for uni instead!
Good luck with your decision!
~Michelle