xli...
the car in hte air nowdays, poor value for money, good engine, best resale, no-factory fitted cng, cheap maintenance.
exi-s....
model changed, good value for money, good engine, average resale, expensive parts, no-factory fitted cng, expensive maintenance.
rxi...
very good value for money, ugly back end, factory fitted top of the line cng system, resale: better than city and slightly less than xli, maintenanve: costly then xli and cheaper than city...