hmm... I never say KRR no good ... just never try it ... he he
... if you buy, then let me try it lor .. 
I buy NSR for the dealer say:
1. the spare part are not expensive, and easy to get
2. the price is reduced a lot since the first existance in SG...
this is due to Thailand currency is not stable compare to TZM which
is ringgit (m'sia). So, actually ... the original price of NSR SP
is about the same with TZM ...
3. The skeleton is using FRAME, KRR skeleton is using tube.. so
somewhat, NSR is more durable ...
4. appearance wise, NSR looks nicer (the color is ugly though ...),
but nbrmind... can respray ... I oso want to respray soon
5. I don't really bother about *speed* cos I am not racer ...
just my oppinion ...