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I had big aspirations at one time, so I got a Tascam MS-16 1" reel & M-520 mixer in combination,... plus an MSR-24 at some previous time,... but for various reasons I've not fully implemented either setup or done any real production work with them. Go figure. My life's funny like that sometimes, but I'm happy in general with the hardware.
I'd scoped a Tascam ATR-80/24 2" reel for future purchase at one time, but in respect to the previous paragraph, I've gone luke warm on the idea lately. Better to fully utilize the 1" reels I already have,... plus I don't have the scratch for a 2" setup at the moment.
As an ironic aside, I've found in the turnaround that most of my inspiration lies in the 4~8-track realm, and I've never really shifted mental "gears" to up my productions to 16- or 24-track, despite having the hardware,... all future/TBD, so again go-figure.
One hinderance to my original 24-track aspirations was the amount of cabling it required to set it up completely. That may be a weak excuse or incidental to other issues, but it's a real concern. My 16-track setup came with a large box of tangled wires that was formerly the interconnect and patch bay, but I've not ventured to implement it either,... tho' it's all quality Canare cable with Neutrik connectors. It could easily take half a day to unbox and untangle the whole mess!
I've found I've always gotten really enthusiastic about ideas in their inception stages, but often I run out of steam in the implementation stages, and the 4-track or 8-track fits my ideas in a matter of expedience and convenience. My recording projects and output is a lot less than it used to be, too, as an additional factor.
My story is not typical. Pay no mind to it, but my vote is for the MS-16 or MSR-24 (1"-R/R) with an M-520 mixer. The hardware is of suitable quality in my opinion, tho' my motivation may not be in place to capitalize on it/TBA.
A nice upgraded console (from the M-520) would be
a Tascam M-600, if you could find one.
At certain times I've contemplated scrapping it all for the Tascam 2488, but.... NAAAAAWWWWWWWWW!!!!!!!!