I helped my friend find/buy/install a Luxman PD-444, I became so impressed with it, I recently added info about it on this site. Option for a second arm, (one can be long), makes it a terrific choice if you have the extra width it needs. Dust cover down/up/easy to remove
Luxman PD-444, high tech within elegant simplicity
We put long and normal length Micro Seiki 505 arms on his, I may buy one for myself I like it so much, it’s headshell fitting is adjustable for azimuth. The Micro Seiki arm height is easy, hand tightened lever similar to my Acos Lustre GST-801, the wonderful SME arms in the photo are not, allen head set screws are used like my other two arms, Blackbird from NewArtVinyl in Russia and a very compact Mission branded Jelco.
To fit my very long effective 12.5" arm, I chose JVC Victor TT81 QLDD Quartz Locked Direct Drive in a seven layer CL-P2 Plinth which needs more depth, heavy acrylic dust cover lifts off
I highly recommend at least one arm with removable headshell, my rear Acos Lustre GST-801 9" arm has that and unique magnetics, the easiest/smoothest height adjust while playing. Headshell with azimuth adjustment is helpful.
You mentioned SP-10, Yesterday I checked all alignments of the Technics SP-15 I gave my friend years ago, with the EPA-BP500 Base that enables optional arm wands. One option, his, is the S arm with removable headshell, like this:
It has a clear dust cover that can be played up/dn/lifted off
ps, luckily as it turns out, my SUT has inputs for 3 arms; one advantage of the Luxman PD444 is it incorporates a switch for either arm, so only one ’phono in’ is needed for 2 arms.