The P3 is a great table. Congrats. I'm not a huge fan of the Elys (or any of Rega's carts), but I won't hold that against you! There are worse for more money.
What's not optimum about your set up? Please don't say its the B60. My heart will be irrepairably broken. The Studio 20s are a fantastic speaker IMO.
If you can get the internal phono stage for whatever piece you'll ultimately use the table with, that should be a huge upgrade. A lot of people rant and rave about the Bellari, but I just don't get it.
If you're unsure about what system you'll ultimately use the P3 in, check out the SimAudio LP3. Its a great phono stage that's very flexible and somewhat inexpensive. I think its the benchmark at its price point.
Also, I know I said it before, but the TT-PSU should at least be auditioned.
Since I just spent a ton of your money for you, I'll stop right there
Have fun with your new toy. Collecting and listening to vinyl can be a lot of fun and a very rewarding experience. A friend of mine just gave me 7 milk crates of vinyl yesterday. My back is killing me from lugging it out of his attic and into my loft/listening room, but my ears have no regrets!