Thank you for your replies.
To answer your questions. I’m not particularly price sensitive. I’ve already spent more than I care to admit on my C64 just because I wanted the original European box in good condition.
I don’t want to mod hardware any more than absolutely necessary (I consider the 2600 composite mod necessary, because getting an old VCR to do demodulation is just slightly more ancient hardware than I’m allowed to bring into the house).
I may bring in some other hardware later. Probably an Atari ST, an Amiga and perhaps some old games consoles like the Megadrive.