I'm pretty sure it's time to replace my chain and sprockets on my SV.  I know this isn't an SV board, but there seems to be a lot of motorcyle knowledge here.

I'm looking at three different kits.

http://www.sprocketcenter.com/p/2578...i-sv-650s.html

http://www.sprocketcenter.com/p/3258...50s-99-07.html

http://www.sprocketcenter.com/p/2915...50s-99-06.html

My main question is if the Sealth/DID kit is worth the extra money? Is there any reason to stay away from the JT/RK combo?