I've heard good thinks about the Prodisk DVD-R's but not seen any yet in the UK.
Be very wary of Datash1te discs though, I've been told that there are dodgy dealings going on with the factory that finishes & brands these discs. What has been going on, so I am told, is that Datawrite launch a new disc... i.e. The Red 4X ones with a Princo dye and they flood the market and everybody loves them because they prove to be a cheap & reliable disc. Then the said factory in Scotland chucks in massive amounts of "B" grade Princo discs (That really should have been thrown away) and they finish the disc with the same branding and pass them on as grade A discs!
Now I think the guy who said this actually works in this factory in Scotland going by the info he had. When asked for more he was a bit reticent to provide any. But they also do the same with Bulkpaq's too, remember the Lilac 1X Bulkpaq disc?

(Datawrite/Datasafe & Bulkpaq are one and the same company btw) Now I bought 100 and they were fantastic, I still have some and have movies on them too and they were great discs. Then all of a sudden they turned to crap and everybody is saying how bad they were. Most were saying it was a dodgy Princo dye, but I think the story I was told makes more sense for these bad discs on the market.
So if you buy Datawrite it seems like luck of the draw, personally I wont touch them after all the complaints I've seen in the consumers forum at CDRG forums. And I see DigitalPromo still won't sell the Red Top 4X discs despite Datash1te saying the problems are over.