I actually voted for the P5. I’ve had several Planar 3s and an RP3 (bought for my daughter), the original is an excellent deck which gets the fundamental things right (clear, uncluttered and even handed performance), and I appreciate it’s historical importance, the RP3 builds upon that, adding some refinement and the ability to add an electronic power supply. The P5 (of which I’ve had two), takes it to another level, revealing a wide and deep soundstage and greater detail and texture... and you can pick them up for bargain prices, I paid £450 for my current one, it’s worth that for the tone arm alone, which is an absolute gem and spanks any modded RB250/300 variant.