Curio :
"the Graham is faster than the 12" Reed and helps the Benz to trace better than the Reed"
Maybe it is so, I'm glad that you have found the best arm for your Benz LP. Actually I think the particular arm may well be the best allrounder for most cartridges and thus the safest bet with the minimum risk. Although I must insist that the energy between this cartridge & the arm's headshell is minimum. By this logic you could probably stay lower to your budget, but I agree for your choice of this elevated quality as you can always install almost everything you wish to your Phantom II in the future.
In my set-up the Phantom II was more linear (in the risk of sounding lean) and maybe more neutral-accurate (completely uncolored in the border of being bland) in comparison for my taste, while the Reed 3Q has a fleshy & organic ID (wood tube?) with equal precision (maybe due to it's 12" armtube) and I witness a more delight tonality & by this a more exciting performance overall with my Condor & Goldfinger. Of course I remind you that my priorities in audio are strictly focused to an emotionally oriented performance (and not invisible or perfectly achromatic components as I see no reason for a monitoring listening, let alone that there are not exist such items).
So : Idler drive TT, DHT SET, Full-Range Horns for me & my vicious audio appetite, although I cannot but congratulate you for your new reference caliber tonearm. (The trackability test is an unmistakable indicator for quality & compatibility. The tonality of course is another subject)
Take care & enjoy your system.