I've just switched back to oem bomb. (067) belt, and it seems to be holding up well and not wearing out too quickly.
For the last few seasons, I used Dayco ultimax II's, the 138-4353 and then the 144-4353. I liked those belts for racing, but they wore out quickly (belt got narrow), and some of them would have cord pull out. I also noticed that when switching from dayco to bomb., I had to either click up tra one or remove 1-1.5g of pin weight to keep rpms.