Few question abt Warrantly and 40,000km service

HI, all.
I owned a 2007 purple Jazz here in ADL.
Still have 2 extend warrantly come with it.
Have done 34,000 km right now.
However, the next warrantly (40,000km) is due next month.
What should I do!!! Need help !

1) Go to Honda Dealer do a 35,000 km service cost $250
2) Wait until 40,000km (around 4 months) to do the major one in dealer.

Another question, how much it cost for the 40,000km service?
If I going to find non-dealer to do it, warrantly will void?

Thanks for helping me!!!!!!!!!