Honestly, it's all good. Most of the action happens in the turns, so you can't go wrong between 1 & 2. You get a full view of the track, and get to watch them race to the line. I think between 1 & 2 are also the highest grandstands (which, IIRC, are also the cheapest seats). Great atmosphere up there. If you can swing it in your budget, I recommend the Bud Tap Room. It's exactly what it sounds like - a big suite with food and beer in turn 2. It's quiet, too, which is either a good thing or a bad thing depending on what you prefer (that place gets LOUD. If you're with a friend/family, bring a pad and pen to communicate). Do not, under any circumstance, watch the race from the rooftop bar in turn 4 (inside the track). All you will do is turn around in circles. But like I said, hard to find a bad spot in the stands. With pits on both sides and passing in the turns, there's always something to watch. They'll fan out, but nothing like they do at the cookie cutters. There's always great races within the race - even lap traffic racing can get dicey. And as long as you're not in the first few rows, you can see every second of every battle for position around the entire track.
It's WAY worth the additional 13 miles and 9 miles from Atl and Chi. And for me personally, I'd drive an additional 45 minutes down the road if that was the difference between Talladega and Bristol. But that's just me.