Recently picked up a L5R book for the first time at a used book shop - Third edition for only $5. Looks awesome, got some people interested, etc. etc.

Only one of us has played L5R before, and he's played 4th edition, which he says is far supperior in many ways to 3rd. What's your opinion here? I'm not against picking up a 4th Ed book (was curious about it anyway), but has enough significantly changed to bother with so soon?