Last year I picked up a new '09 250X and immediately put the Athena 280cc big bore on it and added a Hot Cams Stage II cam. I also took off the emissions apparatus, did all the CC mods including the pink wire, and drilled a hole in the silencer baffle to let it breath a bit better. I really like the bike. It has good low end chug which allows me to pull just about any hill without the wheel spin issues that my 450 would have. When I go full throttle, I can feel the additional pull the cam provides. In all, it is just about perfect, but I think I would like a little more. So... I am considering putting on an '07 "R" head I have to give it a bit more snap and overrev, and here is my question. Do I go with Stainless Steel intake valves, or change the seats to BeCu and use Titanium valves. I understand the Ti setup will definitely rev quicker and give more rpm, but will it be that noticeable? There is about a $300 cost differential that could sway me to the SS valves if there isn't that much difference. I am an experienced rider who has won a few district enduro and one state motorcross titles in my day, but I am now an old fart who is slowing down. I still like to go fast and enjoy the rush of the bike when it pulls hard, and for technical trail riding this is going to be my go to ride. Any experiences or knowledgeable expertise is most welcome. Thanks.