Tonearm recommendation

What a dilemna, hah!

'longer is better', and Reed's on the fly Azimuth and VTA adjustability, I would want it on the Reed, however

I see the mass of your 12" long Reed cocobolo wood is 18gms, it that ok for that modified cartridge/stylus?

cartridge: 0.3mv signal, 40 ohm coil impedance, what SUT/Phono stage will you be using?

To 'show' the cartridge around 400 ohms (10 x coil impedance) my FRT-4 SUT would use it's x-factor of 10.55, resultant 423 ohms, thus signal would be a bit low at around 3 mv. Separate control of gain and impedance would be better/may be needed.

Origin Live makes great tonearms in all price ranges. I have owned a Conqueror, Enterprise, and Agile: all excellent!

everyone

OP has a Luxman PD444 with the Reed and Technics EPA-500 Base with optional wands already, he is asking which of his arms is supposedly best? for that modified Denon 103 cartridge he just acquired

https://www.artisanfidelity.com/phonocartridges/ana-mighty-sound-sculpture-a3

https://www.audiogon.com/systems/11900

https://www.reed.lt/product/reed-3p/

https://www.vinylengine.com/library/technics/epa-500.shtml

try Technics EPA-100MK2 or EPA-100 instead..

Since the Sculpture A.3m is a derivative of the Denon DL103, I would use the tonearm with the highest effective mass available, YMMV.