I have owned both the Rega P8 and P10 at the same time, both are fine tables and well built and engineered, of the 2 I kept the P8 and upgraded from the P10 to Pure Fidelity Harmony and origin live arm/dynavector cart, and in fairness to the p10 its more money, of the 2 the P8 is a better value...(my opinion).
You have to start somewhere, maybe get the P8 with say exact2 cart, find a good dealer 1st.....live with that for awhile and hopefully dealer can loan you a p10, usually with apheta mk3 cart, and stepup if you dont have one.
If to your ears its much better....you know which direction to go, if you aren't sure about the differences....you have your table set up.