If you need good quality cheap disks go for ritek ones. Most writers are compatible and they are usually good quality. Have a look
here for some more prices.
The only problem with going too cheap is that you may well be able to author and write to the dvd -r but half the time the dvd player won't like them. Go for the G04, 24p each can't be bad, jeez I remember when they were over £2 each.
Also beware that if you have an 8X or 16X dvd writer, doesn't mean the faster the better, you may well get better quality at 4X or even 2X, I know I do.