I've found that there are about 3 major types of diapers out there. The cheap kind, they come out of the box feeling stiff and I have to scrunch them up to get them to bend around my child - also not much elastic. The inbetween kind, they are not stiff, they have more elastic and they aren't as prone to leaking. And then the Expensive name brand kind.
Now that said. I've tried all the name brand ones over time and the only ones that I think stand out as worth the extra money is Huggies. I am also a huge fan of their wipes and containers. Huggies are stretchier, therefore the actual diaper is smaller and not so bunchie in the crotch. I can get away with size 3 in these where I usually get size 4 for my daughter in other brands. I tend to look for good sales on these, but don't buy them otherwise.
The middle of the road ones I find to be totally satisfactory. This includes LUVs and Pampers. They're just as good as the Kmart, Target and other off brands. I find Target is the best deal on these types of diapers, especially if you by the box.
The ones I'd avoid are (from the cheap ones): Parent's choice (walmart's brand), White Cloud (they used to be good, but now the quality is terrible and they leak a lot!), Meijer's brand. I really HATE these brands!
Hope this is helpful. Everyone has their preferences, but I'd stick to the cheaper ones unless you're going for Huggies. Best wishes!