New tonearm: wish to upgrade from DV 505

many thanks to all of you for the valuable input.
@ Raul: your knowledgeable suggestions are especially useful, I will go for the points you mentioned.
@ Lewn: comparing the PX 100 M to the Clearaudio Maximum Solution with magnetic bearing, the PX seems to have an inbuild stability in sound production which is fantastic at least in my ears. The Max Sol needs the outer limit stabilizer ring to come pretty close.
Regards walter

_r_walter,
I love your analog set-up. I would love to hear the Onkyo PX-100M. I agree with Raul and Lew about trying a number of things before selling the DV-505...

The advice above is good. Try those and the end result maybe totally satistying. If it isn't and you still need want a new arm that is an upgrade, buy a Graham Phantom MK II. In my 35+ years in this hobby not one other Audio product has universally received such high praise from hobbiest and reviewers around the world. Any others that came close (o.e.g. Quad 57) have had limitations. The Graham Phantom MK II can be the last arm you'll ever need to buy.

Keep the arm. It's still a great arm by todays standards. I am sure it is not the bottleneck in your system. Try more adjusting and different exotic wooden headshells. It will bring out the most in the arm.

Sorry, great as the Phantom II may turn out to be, it has only been around for a few months, whereas the Quad 57 has been with us for 50 years. The Phantom has a long way to go to play in that league.