This thread is a bit old for now and I don't know if you upgraded your stuff or not... However, here are some things coming to my mind...
If you listen to turntable A LOT upgrade the cartridge. Dyna 10x5 is essentially one of their entry level carts so if you like Dyna sound you can get a Dyna Karat such as 17D2MKII or other. This should be a huge improvement.
If you listen to cassettes A LOT get your NAK 682 ZX tuned up/brought to specs by a pro. There are small companies doing this, such as Will Herrmann or ESL, or individuals who could do the same for less. I serviced my Dragon with one them and Im very happy with results.
If you listen to CDs A LOT, consider upgrading your CDP or better get someone tweak it to improve performance. I tweaked my Cambridge Audio 640 V. II and was pleasantly surprised with results.
Here is another, shortgun approach that works if you live in a large metropolis area, have some funds to spend and adventurous mind. Look at LOCAL ads in Craigslist, Audiogon etc and found a piece of gear that you like for some reason and which fits your budget. Buy it and audit in your system; keep it if you like and sell if you dont.