Yeah My Optimum Sync vibrates too, but I haven't tried much blades to say I hate it. I've always used all-wood, so I wanna stick to it till I improve greatly. How about DHS PG7? Is that worth the money? Or BTY Primorac? I'd like a speed beast with decent spin for my serves, as I've said. Thanks again. =))
None of the blades I have suggested, or even the Primorac is a NOT speed demon, although the Primorac is an excellent low range of the OFF scale blade suitable for many offensive players. I do not think a blade exists with the properties you seek. You can get some spin potential, but with that, you wont get OFF+ speed, maybe OFF at tops. If you consider OFF speed class blazing speed, then there are a number of blades that will fit those specs, many already suggested.
A Schlager Carbon equipped with T05 is spinny as all let-out and not as uncontrolable as it might seem. T05 really isn't a blazing fast rubber. Since the spin is nice, it allows players using anything more than an ALL+ blade to hit harder and keep it on the table, making it seem like T05 is a hot-shot speedster, but it really isn't.
If you are still developing your game, I would say stick to equipment that suits your desired playing style and work with a coach, which you might be doing already.
You keep emphesizing spin on serves. Although the blade plays a part, it is not such a large part as when you loop. One generates excellent spin on serve by having a very fast bat speed, with fine graze touch, bat angle horizontal to table for underspin and tilted in other angles for different depths and spin. It is more a matter of developing the right posture, the right timing/coordination of your body, and a good touch for the graze to get heavy spin and keep it short. One does not need a tack rubber to serve heavy, just a great timing. The best servers can really use the wrist at impact. It takes time to develop this and it is pretty un-related to the type of blade you have.
You post a vid of you serving and I bet a number of members here can identify a few things for you to improve upon with you keeping the same equipment you use.