I have been building computers since 2002 and have used nothing but AMD for the past 7 years. I liked Nvidia a lot at one time and wanted nothing but, but fell in love with AMD. I have had almost no driver problems.
Yes, there are a lot of posts out there on the web about bad experiences with Radeon drivers but most of the ones I see have the name 'ATI' attached to them. I think at one time ATI drivers were bad and gained a bad reputation. But those days are long gone and have been for many years.
I felt the drivers had been good for a long time but recently they have got even better. AMD used to release drivers on a monthly basis. Even though I loved that it was a rather aggressive development schedule. Now they just release drivers when it makes sense. This allows them to concentrate more on the finished product rather than a deadline. I have seen a big improvement since then.
Also their 'Never Settle' game bundle campaign has been a big success.
As with any software no program is perfect. Nvidia has their share of issues too. Just run a youtube search for 'Nvidia driver problems' and you will get several hits.
Nvidia does make a good product too but my point is you should have no reservations going with AMD for the sake of driver issues. I think either manufacture will serve you well. I would pay closer attention to selecting a quality AIB card vendor instead.
If you do however go with AMD I recommend waiting until October. Reports indicate that is when AMD will release their new line up of cards which have some significant performance and technological improvements.
If you need to buy right now then the Nvidia GTX760 at roughly $250 (US) probably yields the best bang for your buck.