I pefer the silver laquer ones (about a buck cheaper) but thats just personal preference. ;)
TY's are the granddaddy's of the CD and DVD industry (heck the were the one to press the very first CD-Rs!) and you will have no trouble doing 20X w/ those. Though some Sammy's prefer MCC. And other still perfer -R over +R. (i'm lucky in that both of mine prefer TY +Rs)
All I can recommend is play around with them at dif speeds and see which speed your dvd burner likes best. Use Kprobe (even though its meant for Liteon's it works w/ Sammys that use the Mediatek chipset...like yours does) or Nero Cd dvd speed (I use this program even though it requires a reg hack to work with Sammy's) and see how a good a burn it is. Don't forget to let it burn 3-4 discs at a given speed before "testing" as most burners learn as they burn to improve the burn quality.
Some good guidelines for interpreting the results are:
PI Errors: LOWER is better. avg under 2.5 are good (I like them MUCH lower) but just as important as the avg is the MAX cluster size...under 50 good...under 25 very good...under 10 AWESOME
PI Failures: I like to see under 200 total...but that is a bit extreme by most peoples std's.
PO Failure: SHOULD BE ZERO. Anything more than that and I wouldn't trust the burn.
Good luck and happy burning!
By the way, blankmedia also sell empty 50 and 100 "cake boxes" to hold the DVDs if they don't come with them. The printable ones usually don't as they are made to be dropped into a holder for the automated duplicators. Heres the cake box link:
CD DVD Cake Box Pack and Empty Pc Cake Box - Quality DVD Cases Canada