Sprocket/Chain change

Hi,

I'm looking at changing my sproket/chain set up - probably going to drop 1 in the front. Can anybody recomend the best place to get what I need at the right price. Currently have Renthal (I think) rear with Tsubaki chain which were already on the bike when I bought it but look about ready for replacing. Would like to replace like for like but is there anything special I need to look out for?

Any ideas, tips/pointers?

Thanks

 

Don't forget you'll have to change the rear sprocket, too!!

 

Yep, will be changing front and back for even ware