Upgrade phono cartridge for Rega P3-24

Ok, I posted to this forum a while back regarding a replacement phono cartridge for my Rega P3-24 (It has the Elys II mounted). I was provided with a lot of advice, most of it related to the quality of the rest of my system, suggesting that I upgrade in those areas (most suggestions were for a different preamp) before I consider an upgrade to the cartridge.

My system at that time was:
1. Quad 22L2 Speakers
2. Adcom GFA 555 Amplifier
3. Cambridge Audio Azur 640 CD Player
4. Stock Rega P3-24
5. NAD C-162 Preamplifier

Since that time, I have done the following:
1. Purchased another Adcom GFA 555 Amp and an now biamping to the Quads
2. Have a Herbie's turntable mat to replace the stock felt Rega mat.
3. Sold the NAD Preamp and purchased a Cary SLP-94 with phono on Audiogon
4. Purchased a TTPSU for the Rega.
5. Built an isolation platform for the Rega with two hardwood shelves and Squash balls in between.
6. Bought a couple of Aurelex Subdudes for the speakers to isolate them a bit better.

So, the upgrades have made a big difference. The Cary has made the biggest difference, making it a joy to listen to CDs, and opening up the Rega. Herbie's mat damped my lp sound very well. TTPSU really stabilized the speed of the Rega. My home made TT isolation platform, believe it or not, really helped, as did the Subdudes.

Now I'm wondering if a new cartridge for the Rega would be advised, and if so, which ones might I consider given my current rig?

Sorry for the long post, but I really respect the advice I get on this site. Any help would be appreciated.