I have System 360 left from previous setup. I could possably get Z18T. Do you think it's a big step forward. What system or a set of drivers(since I'm going all active) would be even better in under $2000-2500 range
Depends on your install and tuning skills. If they are avg, then it will be a lateral move IMO...definitely not a "big step forward."
You could put an entire Peerless (8" midbass, 5.25" mid, compact or large format tweeter) set in for half the price and it could sound just as good. Could do the same with Hybrid Audio or SEAS. Just some examples, not trying to tell you what's "better."