Well, I suppose there is no real need to use different cables even if it doesn't screw up the sound. People generally recommend the shortest runs possible, especially with speaker cables and since I have 2 mono amps, I would be able to position the amps fairly close to the speaker terminals.
As far as attempting the splice myself, I have an image of completely destroying the cables the first time I try it... but of course the next 499 pairs I did would be perfect (lol)
Thanks for all your feedback... more ideas than I expected. I really like the idea of contacting Kimber. I didn't know they did that kind of work. I imagine if they can't help, they would be in a position to recommend someone good to work on their own cables....
The suggestion by Zd542 of combining the amp ends sounds like a great idea. The terminal strip on my amp doesn't seem beefy enough to accomodate all those piggybacked spade lugs on the 8 ohm tap.
Meanwhile, I'll read that article by Vandersteen, and then contact Kimble Kable about sending them out. I'll post the outcome...