The GTV is by far the easiest to look after too. It has less silly sensors to break and structurally comes apart and goes back together again nicely. I have the GT as well as the GTV, and while the GT V6 is quicker, it's had so many silly faults by comparison (and gets 50 miles less per tank). The GTV 3.0 will be the classic IMHO. 159 and Mito are just everyday cars... GTA's are another option if you have deeper pockets, but the GTV wins for me.
The eBay car looks great to me, update us on what you find!