I stick with MKM 001s, mostly because they are easy to find for about $2 a disc and the rest of DL media is either less available or simply not worth buying at their current prices.
I did look at how different burners perform with DL media from the same 10- and 20-packs and there aren't many differences. Pioneer 109/110, Plextor 716, LG 4163, BenQ 1640/1655, Sony 820A, and Lite-On 165P6S all do about equally well at 4x, 6x, and sometimes 8x, depending on the pack. There is quite a bit of quality variation between individual packs of MKM 001 obtained from different sources.
DW1655 doesn't strike me as inferior to any other drive I have in DL burning.