Oregon, I've never heard the 103, sorry.
FWIW I've heard Dynavector carts in other people's RB300s and liked them a lot, especially the 17D2. BTW if you haven't had your RB300 rewired, it is very much worth it IME.
FWIW I've heard Dynavector carts in other people's RB300s and liked them a lot, especially the 17D2. BTW if you haven't had your RB300 rewired, it is very much worth it IME.