suggestions on upgrading my system

I believe that for $2000 spent in the AG marketplace could replace the HK with a better integrated. The question then becomes wether you get one with an internal phonostage.  If you like the idea of a separate phonostage, which is the way I would go, you could purchase one now and grade the HK later if you choose, after listening to your system with new phonostage.  The added flexibility may prove beneficial down the road..

I once owned a Jolida JD9 and thought it to be a great one in its price range. Phonostage/cartridge compatibility in important. The JD9was very flexible in gain and loading. It can be upgraded (factory or otherwise). The JD9 does not come up for sale on AG very often.

You might start another thread requesting advice on phonostage suggestions. Mention your system and cartridge when you do. 

Good luck!

I just checked, underwoodwally is selling the JD9MKII for $649 on AG. Check out the ad and maybe give him a call. I have no affiliation, however have talked to him and found him helpful. May offer a return policy. 

After further exploration on the HK990, it appears that it has eq and bass management features that are in the digital domain only. As your are using analog input only you are not taking advantage of this, or if you are, you must be redigitalizing (spelling?) your analog signal to do so.  I have noted that your amp is considered very good as an analog 2-channel amplifier. 

So again, i believe you might find yourself very satisfied with your sonics with an improvement in your phonostage. You may later consider a cartridge upgrade also.

Mesch… WOW!

Talk about going above and beyond expectations. Thank you for all you did to help me in my quest. 

I think I will start with research about a phonostage. I looked up the  JD9MKII. I'll see how it matches up with my Scout's JMW-9 Memorial arm and ortofon 2m bronze cartridge.

Many thanks!

You are most welcome!  Keep us posted as to your decisions.