I've read, in TAS I think, that the reviewer considered a minimum length of around 8' for speaker cables to be desireable in order to get a good measure of their sonic performance. This seems to fall in line with current thinking about power cords. In many cases we all would love to have these shorter than the 'standard' 6 feet. IMHO, using the typical 8-10 foot speaker cables with "long enough" interconnects might be the best bet soundwise. It certainly won't be the cheapest way, but it will offer the most system flexibility and facilitate buying and resale.
Cheers,
Adrian
Cheers,
Adrian