I had a Gyro SE, and did the clamp upgrade. While the clamp upgrade was nice from a usability standpoint (I was used to a screw-down clamp from my previous original Oracle Delphi table and disliked the Gyro pressure clamp), I didn't notice the sonic improvement that others have commented on from the clamp upgrade.
When I started to ponder doing either the platter or power supply upgrade, I quickly realized that for somebody who's comfortable enough building up one of these tables themselves (it's really not that hard...just set aside a day to do it), it makes much more sense to just find a recent Orbe SE on the 'gon, and then sell your Gyro. The difference in used pricing between these models is about the same as just the power supply upgrade...and you get many more upgrades with a true Orbe.
When I started to ponder doing either the platter or power supply upgrade, I quickly realized that for somebody who's comfortable enough building up one of these tables themselves (it's really not that hard...just set aside a day to do it), it makes much more sense to just find a recent Orbe SE on the 'gon, and then sell your Gyro. The difference in used pricing between these models is about the same as just the power supply upgrade...and you get many more upgrades with a true Orbe.