You really need to try a few out, not just one but a few .
I have 3, and they're all different, each has different string spacing and neck width etc.
Yamaha's are really nice, I can't comment on the TRB1006 models, I've never played one, but I have a very early TRB6P model that's a beautiful instrument, but it does have a very wide neck and wide string spacing that some people would struggle with.
My Modulus has narrow string spacing and a beautiful slim neck, as does my Mayones.
You also need to consider technique, it's a different beast to a 5 string, and totally different to a 4 string, though there is a 4 string there, just hiding between the 2 new strings .