Bro we have two pkdm WagonR in my family one belong to my brother just baught in january this year, both are very happy.
There are some pros and cons in both what we considered before buying is easy availability of parts and brand new car without any doubts.
JDM is is more comfortable and smooth drive but not very significant difference as compared to PKDM. But parts availability is little problematic.
PKDM is 1000cc more powerful, feel like 1300cc but seats are not that comfortable but good as compared to cultus. Very fuel efficient 15km within city with soft foot. Good AC and easily available parts and i think better resale then JDM.
For family its very spacious.
I would suggest go for PKDM. But please do little more research on pros and cons then decide.
Best of luck
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