If you have an LCD TV and there wouldn't be conflicts with other members of the household most of them can double as computer monitors. In fact, most of them are basically flat screen computer monitors with added functionality.
NES was the only option for me. I've always been behind the times, technologically speaking, so by the time my brother's brother-in-law gave another brother and myself his old C64 you couldn't get software for it. The only Atari system I've played is the 2600, which the game was never ported to and again games were unavailable for it (though it was still recent enough that flea markets and yard sales sometimes had them).
I found it in a flea market in 1998. I almost passed it up because the label had me believing it was a shooter or a sci-fi themed platformer but we were coming up on a 3 day weekend and I was bored with my library so I bought it. Once I figured it out (no manual) it was the only NES game I played from then until I got my N64 in 2000.
I never saw the point of single player tournament and when I could get my friends to play they wanted to play standard since they thought tournament might be longer and they didn't really like the game so I never even heard of crystite until a few days ago. I use to be good at the game but the whole crystite mining thing consistently keeps me in 3rd or 4th place now.
You don't always get a message box when a program crashes. There are times I'll be working with a program, it will crash, and I'll get a box but other times it just vanishes. I suspect it has something to do with memory usage or the like.