The CX model has the shittiest trannys ever, so I would say 16's if your lucky..but if you go to the track you'd probably going to get 17s.
The Cx is non-VTEC with stupid long gears. I had one in my car before the K, you do over 80mph in 2nd gear. Maybe with an EX swap VTEC and the better gears you might be able to hit 16s. I know a kid around here that finally broke into the 15s (15.99) with an EX EG coupe with I/H/E ghetto fuel, VTEC and igition tuning.. But in any case your car is slow no matter how you look at it.