You were pleased with AP Oval 9 but you upgraded..

I am curious to hear from those who owned AP Oval 9 speaker cables for a real extended period of time and then upgraded.(as opposed to those who immediately disliked them after a short trial period). What did you upgrade to and why?

Or conversely, you thought you could do better than the Oval 9s but after further evaluation you didn't find a worthwhile upgrade cable.

Please try to provide as much specifics as to differences and improvements attained with your new cables. Or why you decided to stick with the Oval 9s.

Thanks.