Well, I didn't want to turn Dre's thread into a debate about tonearms and I probably exaggerated a bit by saying that the cartridge would sound much better on the Triplanar. Look, these are both very good tonearms. That's why I own them.
I've owned a Vector for about 5 years now. First a Model 1 and now a Model 3. The Vector is an outstanding tracker and can tame even the most difficult cartridges with its rock-like stability. If you have a Basis table there is no better arm to have mounted on it than the Vector. At one point I had both a Graham 2.2 and the Vector with the right armboards so I could change the arms out. On the Basis 2500 table that I owned at the time the Vector was superior to the 2.2 in just about every way. Probably because the Vector is much more stable.
I've owned the Triplanar for about 2 years now. Also a very good tracking arm when setup properly. The triplanar is probably not as consistent as the Vector with a wide range of cartridges. However, there are those, like the XV-1s, that combine very well with this arm.
Ok, so why do I like the Triplanar more than the Vector with the XV-1s? Well, maybe it is because I find the Triplanar much easier to get setup correctly and repeatably. I have not been able to get the same nuance and micro-detail from the Vector that I can with the Triplanar. Maybe there just isn't the same synergy between the Vector and my Gavia. Maybe it is because of the silicon damping that must be used with the Vector. It is true that you cannot get the same Galibier Stelvio armboard that I use with the Triplanar because of the way the Vector mounts. This would also be the case with, say, a Graham tonearm. In talking with Thom, we decided that I could get very near the same results as his regular armboard by fashioning one from cocobolo. So I fashioned an armboard using opposing grain layers. Maybe someday I'll be able to get as good results with the Vector as I do with the Triplanar.
Well, there it is. My experience and opinion. Others will have a different opinion and experience and that's ok. YMMV, and all that.
Dre, good luck with the Titan i. I only know this cartridge by reputation but I'm sure you'll be very happy with one mounted on your Vector.