I need good quality binding posts and have been looking at WBT Topline and Cardas solid brass posts. I need something to grip my 5/16" spades better. Any thoughts on the crimp on WBT v/s soldering the connection? Also what about just soldering my speaker wire directly to the wire in the cabinet (how would I plug the holes to keep the cabinet air tight)? Any recomendations will be appreciated. THANKS!