I have a 500 with ACA.
Thought a 1200 would be quite nice in the collection. And one or the other game or demo already exists.
Well, was just ne flash idea of mine 🙂
But something has to happen at all.
I would sell A500 with ACA, and buy A600 instead, equipped with extra 1 MB Chip RAM (25 euros), A600 accelerator Furia 33 MHz (120 euros), Scart cable from Retro Computer Shack (25 euros), Kickstart 3.1 for A600 (15 euros), angle IDE2CF short cable adapter (20 euros), Compact Flash Card 4 GB (15 euros), and then I would fill whole CF card with WHDLoad games 
For 220 euros you have everything extra you need for Amiga 600.
And then connect Amiga 600 to DLED 24" TV with Scart output. Crystal-clear picture, black is black.
Much smaller footprint, nothing is protruding from A600, and you have brand new add-ons.
Probably you don't need to put extra cash in it if you sell A500 with ACA.