[quote name='EliasMooseblaster' timestamp='1453740141' post='2962324']
All but one of my basses is a 4, and the exception is the 8-string. So, technically, you could argue that was a double-coursed 4.
I can see the sense and, up to a point, the appeal of extending the instrument's range - though given my own playing style, if I were to invest in a 5er, I'd probably look to extend the range upwards rather than down (i.e., EADGC).
[/quote]
Why choose? get a 6. Then you can play 2 8ve scales in the same hand position =P.