Sherline model 4000 ** LINK **
Sherline lathes are a similar concept to the Taig lathe. Plenty of accessories available including DRO and CNC options.
Sieg C0 is the latest incarnation of the Unimat 3 (which was derived from the Toyo ML 210). As supplied it is a very nice, though small, plain turning lathe that can be lifted by one (strong) hand. Accepts all Unimat 3 accessories making it a very versatile machine and can become the heart of a small workshop. I would strongly urge you to obtain and read "Unimat 3 Lathe Accessories" by Bob Loader (#43 in the Workshop Practice Series).
I've been using a C0 for several years and am very happy with it.