Of course, the LBS wants you to ride a P3 out of their inventory before the P5s come in. But it’s not the right bike for you. The 17-degree happy stem is just silly. On top of looking like a goof and compromising your aerodynamics, it would also compromise handling. Don’t do it. That bike doesn’t fit you. Have the good folks of Outspokin provide you with a list of bikes with stack/reach geometry that fits your body and riding position. The P3 ain’t it. Good luck.
To the OP: You can also check out the stack & reach database yourself on slowtwitch for bikes that might be a better fit than the P2. Also, I might go a bit conservative on bike choice and not buy one where my stem is completely slammed with no spacers at all. Fit is a dynamic thing, and if your flexibility improves it might be possible that you could go lower than you currently are (may not be true in every case.) If you get a bike that has no spacers at all, you have no ability to adjust.