Simaudio P-3 vs Bryston 1B vs. other options??

This may be an totally stupid question. But I have a Bryston 1B and I'm contemplating a Simaudio Moon P-3. Anyone know how they stack up? I'm really pleased with the 1B, but I'm not sure if the P-3 will be a sizeable upgrade. Amp is an Acurus A200. Eventually I'd like to move to a beefier nicer amp, but for now I'm looking at a pre upgrade. Other options are an amp upgrade, or going to a moon integrated. Thoughts anyone?