I doubt you would get ANY benefit from replacing the bridge plate on the speaker terminals. Companies use the bridges they put on there for a reason. I don't think they would use it if it made the speakers perform less than it would using 12ga or whatever wire instead.
my equipment is b&K ref 30 pre amp a rotel 985mkll five channel amp a marantz cd player and a pioneer elite dv-37 right now i am using tributaries sp4 for the fronts and monster for the rears from rpre amp to amp is straight wire sonata interconnects. my front wire lengths has to be at least 12 to 15ft. cost im willing to spend at least 100 to 200 just for the cdm1nts for now . shoul i upgrade the innter conects to?
Just picked up 3 10' runs of Kimber Kable 8TC to biwire my Nautilus 805s and HTM-2 center. They retail at $14/ft, but at lenghts of 20' or more, a dealer will usually discount that to $11/ft. I know it's a little more than what you wanted to spend, but these are a great value, IMO.