I have owned two SME model V's,and the Triplanar.For what it's worth,when installing my Triplanar,I was quite impressed with it's "amazing" bearing rigidity/smootheness upon installation.This probably seems silly and redundant,but the arm's movement in free space,when mounted on the armboard,and being moved into place,"blew me away".Of course,it had moved "out" of the arm lock,to notice this.I guess you had to see this to understand,otherwise it seems like a stupid point.
The SME,obviously has great bearings,yet there was "something" about the Triplanar that stated...."this is hand made,and tweaked to the max"!!
I,also,found the SME bass to be a bit over-ripe,in my older COSMOS.
My friend had a SME-V on a VPI TNT,at the time,and felt bass response was a bit over done.Of course synergy has everything to do with it,but if I were to choose either arm today(assuming my table could accommodate them equally well)it would be the Triplanar.Warts and all Doug!-:)