I'm considering getting myself a crossover (since there is a $6xx one available with fixed upper and lower pulleys)...
Cages Smith Machine, Rack Smith Machine, Cable Crossover Machine with Swivel Pulley System
(would give me somewhere to hand a pair of rings from as well, something i don't have currently)
A narrow crossover provides (for me, i have a pretty big wingspan), most of the utility of a functional trainer, i'm also wondering if i'm going to miss adjustable height pulleys though....
(no space for a power rack at present, i'll be getting one if i ever move to somewhere with more room)