Yeah, definitly get all the basic maintence completed, and keep a record of it for future reference. Knowing what you did and when is a big help! Get the ergonomics of the bike to fit you, meaning suspension, levers, bars, seat, etc. I'd rather spend money on things that are proven to help with the longevity of the bike and myself, than on performance parts that can be hit or miss. You don't need to add more power, until you make sure you have the bike dialed in to your preferences, and are using the power it already has to your advantage by a setup that works for you. A little maintence and set-up can go a long way!!
A Good List
-Suspension
-Jetting
-Top End, even just a check
-Replace All Fluids, fork, motor, radiator, etc.
-Check All Bolts, Nuts, Spokes, etc..
Check and Replace if Needed
-Chain 'n Sprockets
-Reeds
-Bearings
-Air Filter
-Grips
-Levers
-Pedals
-Brakes, etc......
Just go through your bike paying crucial attention to detail, make sure everything is nice and tight, or lubed up good. Check your oils and fluids and change them. You're starting fresh with the bike, so the bike should be fresh also. KNOW the last time maintence was done, DONT just guess at it. Get to know your bike, get it set up for you. Theres no use buying performance parts, unless a part is in need of replacing, until you can use most of the power that's on tap. I would buy protection for my bike before I would buy performance. A good pipe bash gaurd would cover those dings up and cost a lot less than a new pipe, plus make it look good too. After you get it all covered up, if you must do some sort of mod, I would call up Eric Gorr, and have him port your motor. Porting is a deciding factor in when your power kicks in, and how it kicks in.