Analog Upgrade - Where to start?

Why? is something wrong? Sure sounds right. You a valve person?
Preamp, how about a Herron if you can find one.. Nothing BUT great reviews..

http://www.thebestamp.com/

LOOK really cool stuff  JUST LOOK..

Decware, ZP3 its a real peach for the money.. Valves pure as the driven snow.. Point to point, ART by design alone.. Runs really cool to..

Regards

The Miyajima Kansui mc cartridge would be a significant upgrade over the Dynavector. I recommend using an SUT with it. Bellari makes a good one for ~$500 - I have one in use. The rest of your phono system is fine - no need to change it!

Agree with the vote for Space-Tech Labs. For the price paid, it’s very good. It may displace the Stellar. 

Your system specs look good to me. Based on what you said; “ looking for more dynamic sound, detail (without edge) and musicality.”, the first places I would look at are 1., the phono cartridges…there are so many newer models at various price points since your last cartridge purchase, that this one upgrade may itself solve your quest, 2., the phono stage…again, many options to play around with at various price points for phono preamps. 
Depending on your budget, the cartridge market is a free for all. There are plenty of below the 5k mark, and in between, 5-10k, it is another world, and then above 10k, more rare species of cartridges. If you like what Soundsmith did for you on the retip, at the just below 5k range, the Sussaro MKII is exemplary.