Rega P5 w/Denon 103R what should I upgrade to?

I tried a 103R in my Linn LP12 with a Rega RB300 arm and in my Denon DP 61F and while it was very good I much prefer the Audio Techinca 33 PTG to the 103R in either setup. Not a put down of the 103R but if you search the archives you will find a number of folks who feel the AT is a substantial step up from the Denon.

Hey like the comments maybe I should have given more info to you guys.
I have modded the J9 (6moons) except for the oamps which are on the way. I'm using NOS RCA tubes. My table is also modded counterweight, subplattter and dual white belts and a herbies mat. Thanks again for the info I appreciate your knowledge and learnings.

Vince, take the plunge on the Zu 103, it beats the stock 103, and is well worth the money ($800+). I've gone on to get the Expert Stylus And Cartridge Company here in the UK to mod it with Paratrace stylus and White Sapphire cantilever for £280 ($450+). It comfortably outpaces my 4x pricier Transfiguration Orpheus. An unbelievable giant killer that I would not swap out.
I have a thread devoted to the Zu 103 ESCCo mods.

Mingles-
I sub'd the stock tubes with cyro'd Mullard reissue 12AX7 with long plates. I also performed the rest of the upgrades on 6moons article.