I'd like a fully specced A4000 ('060, graphics card, USB, Ethernet) - and I suppose everyone else would too! Shame about the $$$ required... :-(
I might upgrade my A3000 desktop at some point, but again, the cost is a bit prohibitive...
To complete my Sinclair collection, I'd like a little-known Science Of Cambridge MK14. For those that don't know, these predate the ZX80 and ZX81 and consist of a small PCB, hex keypad and LED display. Problem is that they're very rare and the last I saw fetched well over £300 on the UK's eBay, and the chances of me getting one now that I'm in NZ are pretty much zero!
I'd also like another rarity, the Enterprise. I think this was UK-only and was originally announced as an 8-bit killer machine. It was Z80-based and had very good graphics modes for the year of its announcement. However, by the time it was released, it was too late and the Spectrum and C64 had already got their stranglehold...
- Ali