IMO, regarding the DL103, and I have one, the regular DL103(spherical stylus) model is the best value. It is $200 or less, and does as well as some very high priced cartridges. When you get to the DL103R(improved coil strucure), DL103PRO(Broadcast cart), DL103FLS(Hyper-elliptical line contact, ceramic body), you are raising the price close to where you can do better by spending a little more and going with a Shelter 501($650). The output of a standard DL103 is .28mv-.3mv and requires a step-up device. The correct load for it is 40 ohms. I didn't recommend it in my above post, because I didn't know if the PT-6 could handle it. I have since checked it out, and the PT-6 has ABEC 3 grade bearings, so it should do fine. ABEC 3 is the same rating as the bearings in the SME IV. The DL103 is VERY stiff and tracks at about 2.75 grams. It takes quite a few hours to break it in. Cartridge weight is about 8 grams, compliance is 5.