OS X 10.3 won't be releaseed probably well into the fall of 2003, despite being announced in the upcoming Macworld Expo. I would grab 10.2 now - you won't regret it. 10.2 is so much better than 10.1 in just about everyway. And if your Mac can take advantage of Quartz Extreme, then it's even worth more to upgrade to 10.2
10.2 is absolutely awesome, but I would wait the 6 months until 10.3 as the rumor mill points it to being a paid upgrade, so there is no need to shell out nearly $200 CDN twice. That is unless you want to.