evening..got back in to riding,, bought a 2006 kdx200, i need chain and sprockets..so help

i want something to last, not stretch every ride, my riding styles is the weekender..may try some races..not motocross by enduro style tight trails and basically just having a good time

so there are so many choices..o ring x ring roller....

i use 13 front 47 rear stock gearing..

and i dont want to spend a house payment..please help and let me know a good choice and where to find..

thanks