sprocket/chain

i need to replace my rear sprocket. i'm planning on buying a renthal aluminum rear sprocket and an r1 520 gold chain. is there any feedback on these products? the bike is for moderate/hard rec. riding. no racing.

thanks.

The last chain and sprockets that i bought included a renthal 520 frear for my RC51. It held up nicely. Used on street and track. I am now about to try vortex sprockets on my 954 and k6 750.