Upgraded turntable - is my current setup sufficient?

Thanks for the reply. You have a beautiful setup there. well done.

We seem to be on the same page - slow and steady is how i've been building and always an eye out for cost effective deals. In fact this table is the first item i've purchased new. Everything else has been used or a hand-me-down.

My table is currently sitting on a pangea rack sitting about 4 feet from my right front channel. My floors are hardwood so it probably makes sense to look into some isolation gear. 

One silver lining with this virus... plenty of money to burn. 

Oh one more question. Any recommendations for a dust cover? I've seen some out there for around $180 bucks but wanted to make sure i wasn't missing any other options.

just to confirm, your denon is vintage dp 3000? or a typo, is it the current dp300?

either one, you are changing from direct drive to belt drive, I prefer DD, quartz locked (on, instant and maintained speed); but if you didn't/don't hear any problem, don't have power variations, after motor warm up, speed of belt drive should be stable.

IOW, I don't think the table itself will make a difference, and I think other things done correctly, more expensive tables will also not be as important as the arm, cartridge, phono stage. 

If vintage dp 3000, you didn't mention current arm. 

cartridge, the new clearaudio will definitely sound different, and should also be an obvious improvement.

However, it is an elliptical stylus shape, so even if better, a future upgrade to advanced stylus shape, Microlinear, Fineline, SAS will be a definitely audible further step up.

It has much tighter channel balance .4db existing is 1.5db. that will definitely tighten the center resulting in improved imaging. channel separation specs are very similar 25/26 db.

Signal strength: new clearaudio is lower 3.6mV signal; existing is 5.0 mv. You will definitely need more juice out of your preamp/amp for same volume as existing cartridge. If it remains quiet, no concern. If tubes, you will be driving them harder. Great results, who cares. 

Cartridge change n the future, I would consider higher signal strength, lighter tracking force, wider separation, keep tight channel balance.

I would assume your turntable is dp300f.
The Marantz turntable dwarfs rest of your components. I think the biggest bottleneck is the phono pre. Then, your speakers, and preamp, and then amp.
Your turntable and cartridge deserve at least $300 phono preamp. Your Rotel amp and Adcom preamp will be OK for a while, but you would not get 100% out of the turntable.
My suggestion is, seriously looking for better phono pre ASAP, and then save $$$$ for next speakers and amps.

Yes - dp300f. No typos - also it is belt driven. Stock arm and upgraded to sumiko rainier cart. 

Any suggestions on a phono-pre that pairs well with the clearaudio cart? 

I don't see myself upgrading the rotel amps or speakers for at least a couple years... Though you never know should a good deal come around. 

Experimenting with some different phono's seems like an easy enough exercise though. Thank you. 

The Schiit Mani has got to out-perforn the Adcom. I'd start there. You can also add a linear power supply for an uptick in SQ.