Interested in upgrading my vinyl setup. I currently use a rega rp3 with Elys II cartridge. I use a vintage pioneer sx-838 receiver and utilize the phono stage located within. My speakers are vintage pioneer hpm-900s. I have thought about upgrading the cartridge to the rega Ania with the accompanying rega fono. I have thought about selling the rp3 to go towards the purchase of the new p6 and the Ania cart. Other options include going with a new receiver but I tried the previous Rega Brio and preferred the sound of the vintage pioneer receiver. I could also upgrade the speakers and sell the old hpm 900s which seem to fetch a decent amount these days. With about 1500 dollars, where would I see the biggest gains by upgrading?