Upgrade suggestions

Or simply spend $500 on a mint used $1500 cartridge. I've done it here more than once. The last one I acquired, a Benz wood SH scoped out as a new cartridge would...the stylus showed zero wear. Your table is fine, now it's time to deck it out with a better stylus...there are a ton of nice used cartridges always for sale on AG. Buy one from a reputable seller. Better to make one change at a time so you can hear the differences you're making in the system. You can always upgrade or change electronics at a later time...baby steps...life's rule, not mine :)

I'm guessing your PS Audio phono stage is the GCPH phono stage which is no slouch. That phono stage sounds pretty darn good and if you try to replace it (without spending a fortune) I think you might be disappointed. I agree with others that said replace the cartridge. And I absolutely agree with Coltrane1 one change at a time.

If your preamp is the Ayre K1, it probably has a phono preamp in it...line 2, but maybe not indicated. If it doesn't, you can get Ayre to put one in...I don't know the cost, but it is a fabulous phono stage.

One of the challenges when asking for advice on Audiogon is that you often get way more good advice than you can practically (or financially) act on. ;)

There are a couple themes that run through the suggestions that have been made here I'd highlight to you -- first, your turntable and arm are fine -- don't bother replacing them. Second, an important part of upgrading your sound is getting a couple essential accessories -- a good alignment protractor (as Macdadtexas suggests) and (I would still argue) a good record cleaning machine. To which I would add, on reflection, an Onzow Zerodust to clean the stylus on your cartridge.

There seems to be a consensus that your GCPH phono preamp is a good fit for the rest of your system (I had suggested a phono preamp upgrade, but bow to the collective wisdom of the other respondents).

Then, look for a good cartridge upgrade oppotrunity. I agree with those who suggest a used cartridge from Audiogon is a definite option, but second Coltrane1's word of caution -- purchase only from a seller with pretty hefty positive feedback -- a lot of used cartridges have been abused. The biggest challenge you face is that phono cartridges, like speakers, have real personalities and make performance/price trade-offs. So you may want to set your purchase price range to allow you to pick two or three, and purchase them one at a time, as Coltrane1 and Lak suggest.

Hope you have fun with your upgrading.

Rdavwhitaker,
I agree with all of the feedback you have received.I've owned many Rega tables (& still use Rega tonearms).I always found the Rega cartridge to be the weak link in an all Rega turntable set-up).I found The well reviewed and very affordable Ortofon OM-30 Super to be a significant improvement over the top-of-the -line Rega Exact.Other cartridges that have worked well for me with stock and modified RB-250 & 300 arms are the Dynavector 20x,Clearaudio Virtuoso Wood,and Ortofon 2M Blue & Bronze.All of these cartridges cost under $1000 (The Blue and Bronze are less than $500).

On the other hand,a new table can be fun.The Marantz TT-15S1 comes with an $800 Clearaudio cartridge and retails for less than $1500.I've seen them used for as low as $750.I got a great deal on a new Acoustic Signature Manfred with an RB-250 arm.
Vintage tables can be fun as well.I've been collecting Dual CS 5000 tables(I have 4)and just acquired a Thorens TD 125.The 125 fitted with a Rega or other fine arm is supposed to be a World Class Table!

Sorry about the rambling.