D40 OR D40X

OR

Well i am a beginner for DSLR,i love photography very much.
I need some Professional 's advise for both of these cameras.Both of these camera make not much different, is just that the matter of mega pixels they are different of.I have read plenty of review but i still can't figure out which camera to chose?

I hope you guys can give me some tips on DSLR. Thank you!!