Titleist has the Pro-V line released in alternate year from the Surlyn lines, so something new comes out every year. The largest user cycle is in the fall and some users may be involved earlier in the testing cycles. Having your profile up to date on TT and participating in discussions will improve your chances. You can also check with local clubs to see if the Titleist reps will be doing ball fittings. Base on your characteristics, they generally finish with some samples of what appear to be best matched to you.