I think shorter is better. I have heard the difference. I make my own cables, so I can make long ones and short ones and have spares lying around since they're so cheap. As I understand capacitance is the most importance factor in interconnect sound, and halving the length of cable will substantially reduce the capacitance (not halve it because of the capacitance of the plugs).
I'd get one short cable on sale-or-return and find out if I could hear a difference. Perhaps you won't, but science says you might.
I'd get one short cable on sale-or-return and find out if I could hear a difference. Perhaps you won't, but science says you might.