I have an MP800 that works great on all flavours of TY printables, white or silver.
If you are demanding on quality scans then go for 8X media. If you are not too unlucky, you can pretty easily get your fair share of QS 99ers burning them at 8X. They also can overburn to 12X with still good quality.
+R produce less PIE (like 10 000 for a fairly good batch vs 50000 voth -R) but more PIF (200 vs 100 in the same condition)
OTH, it is very difficult have more than 97 at QS with TY 16X media at all speeds, even the lowest possible. I think both burners and dye formulation or manufacturing process for the T03 and G03 could use some more improvements.
My 2 cents...
edit : Value lines as such are not available where I live but I came across TY disks repacked in 10 or 25-boxes. They are awful : dust and scratches all over the place. Go for 100-packsT (they are more likely to come straight from the plant) or jewel cases.