I have used the £15/100 ones for three years without any problems. I would imagine that the CDs will be binned/put in back of drawer after a few years, go for the cheap ones...Ritek Jaguar...100 for £15 from click here
I think with cd's you buy what you pay for. Back in the day when i first started to burn cd's i got the cheapest cd's of all different brands. And i use to get alot of crap cd's. So i decided to try out the more expensive cd's and i havnt had a problem with them for yrs now.