i have prj's. the stock ones clip on better. better connection, better spark.
with an amp set up and speakers, you can run a little wire from the amp and get the same power to the speakers as you can with large wire. so the size does not really matter.
like said, i have both, and the stock ones clip on better, they seem to work better for me. and you can get a lifetime warrenty with the stock wires, so you will never have to buy them again either......
but its up to you, if you feel like spending the cash, cool. but there is nothing wrong with the stock ones.
