Build the ZX81 kit! I've done three of them and they're easy and fun (if your soldering skills are good). If you're planning on using the ZX81, remember: you don't *have* to build it into its case (with its "unique" keyboard) and you can also leave the RF modulator out and make an easy modification to provide high-quality video to a modern TV with composite video in. It's also easy to increase the onboard RAM from 1KB to 32KB. You wind up with a pretty fair Z80 system with a decent BASIC, crisp video, access to the Z80 via the expansion port, and adequate memory. Let us know what you do! Glen 0/0