Yes those are probably the best media currently on the market.
Supermediastore probably sells more TY discs to the consumer than any other online dealer who sells TY. Also SMS are a safe bet as far as getting authentic TYs... Their shipping is very fast also..
However one down side is that there are lots of complaints about their barely adequate packing. Add the fact that currently those TYs you asked about do not come with a stacking ring so that just adds to them rattling around in the boxes they pack them in.. You might want to consider getting those exact discs at Rima.com who are also in Calif. They will probably cost you a $1. or $2. more for those 100 discs but it might be worth it to you to get them shipped properly.. Rima also has a reputation of selling authentic TY discs and fast shipping and better customer service