I wouldn't worry about any rumors on the sound of SME arms. They are right there at the top and the right cartridge can get a wonderful pairing.
Stereophile, in their review of the SME 10 table did a comparison between the 309 and the IV.Vi. That should get you close on the info you're seeking.
http://stereophile.com/turntables/376/index.html
I owned a SME 20/2 IV.Vi arm for nearly 10 years. The SME arms have the best build quality out there imo. I can attest arm cables make a big difference on the SME arms (I used a Hovland, Graham IC 50, 2 different Purist Audio Designs -Venastus and Proteus Provectus)
Arms are hard to judge, did you get the cartridge dailed in exactly like the comparsion arm? Etc. I suspect the SME V and IV.Vi are better...but you might also be better off spending more a arm cable or cartridge to...
Good luck !
Stereophile, in their review of the SME 10 table did a comparison between the 309 and the IV.Vi. That should get you close on the info you're seeking.
http://stereophile.com/turntables/376/index.html
I owned a SME 20/2 IV.Vi arm for nearly 10 years. The SME arms have the best build quality out there imo. I can attest arm cables make a big difference on the SME arms (I used a Hovland, Graham IC 50, 2 different Purist Audio Designs -Venastus and Proteus Provectus)
Arms are hard to judge, did you get the cartridge dailed in exactly like the comparsion arm? Etc. I suspect the SME V and IV.Vi are better...but you might also be better off spending more a arm cable or cartridge to...
Good luck !