A few years back I traded my LP12 in on the RP10 as the LP12 had run its course with me. I realize the P10 is a different table,but yet very similar. I also have mine on a Symposium Seque Stealth and a Salmander cabinet. My floor is also a suspended floor and footfall is a real problem for me. I have been trying to come up with a solution to either add another isolated cabinet that could be placed against the wall or brace the floor from underneath. A wall shelf really isn’t a viable option for me, or at least without a custom shelf which could still propose other issues.
But as far as the table goes, it was my choice between a VPI Classic 3 and the Rega and I found the Rega to be closer in sound to the Linn. Incidentally I did at one time have the HRS platform under the table and it sounded great, however it was too big and I needed more room. But I think you will be very happy with the Rega once you get it set up.