Generally, there is no true "best" brand when it comes to bland media. It really depends on what works best for you. I have had the best luck with sky brand CDs and DVDs but for other people I know they don't work as well as memorex.
Honestly, I'd buy like a small 5 or ten pack of all the brands you could and try them out to see what works best for you.
Firstly , HI and welcome to CF, as to your question you can go for brand names but after a while you will find its personal preference, where are you from, I'm from the UK and tend to go for offers so I use 7 DAY SHOP.COM, I like epro DVD-R but there are plenty others like Data write,SONY, TDK.MEMOREX the list goes on and on, what you will find is if you buy them in bulk you will get them cheaper it also depends on you DVD writer as to which type you get although most do DVR-R & DVD+R and dual layer.
yea i dont find a huge difference, although sometimes i find some of the cheaper ones fail during burning but a lower write speed usually ensures this doesnt happen. just see whats on offer and choose some that you are happy with, and if they are no good then learn from that.