The SX-64 is one of my favourite machines, in that it's a C64 (which I grew up with), but it's portable. It's collectible, of course, but it's also really good looking, if you ask me.
If course, portable is a stretch :lol:
The cool part of it is that it's dead-easy to repair. With the exception of the 4" screen, most parts are readily available, in the sense that regular breadbox 64's and 1541-drives are fairly easy to come by, and everything in there is built on exactly the same components. When I got my second SX-64 (the first working one), it had a dead SID, but I could just nudge one from a reagular C64...Neat! (And as a note on my first SX, the non-working one. I intend to try and fix it, but it had been modified beyond recognition when I got it, and was totally dead, so I haven't had the patience to look at it yet)...