Hi All. I've owned a Yamaha Secret 04 racquet for many years. After a few years away from tennis (back in school), I'm ready to start back up. My concern is that I might have lost a step and a bit of swing speed. I'm wondering if today's racquet technologies have alot more to offer than my 12 (or so) year old Yamaha. Oddly enough, I just can't help but feel like the racquet is still a top notch stick. I'd like to take advantage of the latest tennis racquet science, but the Secret 04 just feels so good in the hand...Any thoughts? What, if anything, am I giving up by sticking with the old standby? Thanks!