Speaker cable upgrade from Analysis Plus Oval 12

I have been using Analysis Plus Oval 12 speaker cable for about 10 years. Overall, sound is good and clean. However, the upgrade bug has returned. What current speaker cable would be an audible upgrade from the Oval 12 without spending a lot of money.... I have a Creek SE 5350 Classic integrated amp(85RMS) and a pair of Silverline Preludes which are biwireable, which Silverline claims only makes marginal difference....I am possibly going to replace the Preludes in the next year with Totem Hawks or the new Usher Be718 monitors, but might just stay with what I got....All advice and opinions welcomed