Burn speed has nothing to do with how pixelated the movie looks-that 100% depends on how much the movie has to be compressed to fit onto the DVD+/-R disc.
Best bets for max quality:
1. Using DVDShink, rip only the main movie (Reauthor mode). Use 3.05b, not 2.3, and use the Deep Analysis mode.
2. Rip the movie using DVD Decrypter, and compress it using the new version of Nero Recode-again, enable the Deep Analysis mode.
3. If you have to have the entire disc, compress the extras/special features more than the main movie.
4. Don't forget to remove any extra audio tracks you don't need - spanish, french, director's commentary, etc. Also DTS takes up a (bleep)-load of space compared to AC3. Personally, I just keep the 6-channel AC3 track only.
No matter what: minimize the amount of compression you have to do on the main movie. If you have a TV show disc, try using DVD Shrinks reauthor mode to put only 3 ep's/disc instead of all 4-it helped A LOT on the CSI backups I made. Recode 2 did a VERY good job with a full disc copy of them, though. Some artifacting was still visible-but it was very hard to see. I'm just the kind of person that looks for and can spot that kind of thing very easily...
I hope that helps you!
Soon to be proud user of Mandrake 10 (again!). SuSE 9 sucks!