OK, from experience here's what you might want to consider for a $1000 budget. I have auditioned at home or owned these carts and phono pres that I think will work with you RPM 5.1.
Grado Platinum Statement $350: MM, actually moving iron, I had one for several years and this was my first high end cart, great tracker.
Sumiko Blue Point No 2 $399: MC but a great tracker and one of the best for entry into MC and this would work well with your Project table.
Musical Fidelity V-LPS MKII $189 for either MM/MI or MC. I demoed one of these not too long ago and it was sweet and balanced, a great bargain.
Cambridge Audio Azur 651P Phono Preamp $229 for either MM or MC. Great budget pre amp.
The above combos for well under $1000 new and will match the performance of your table and arm.