Recommended Upgrades ??- Prophet

Hi all,

I currently have a 2005 Prophet 800 (specs below). I use it for mostly XC work and am starting to do longer distances on it (even thinking about some solo 24 hr events on it). I'm starting to find it a bit heavy and am wondering what upgrades anyone would recommend to save weight/improve performance?

Thanks very much, Pete
Frame Prophet , Fork Lefty Max TPC , Rear Shock Manitou Radium R Air ,Rims Mavic XM117 Disc, 32 hole , Hubs Cannondale Lefty front, Fire Disc rear ,Spokes DT Champion, Tires IRC Trail Bear, 26 x 2.25" ,Pedals Shimano PD-M520 , Crank TruVatiV Firex SL, 22/32/44 , Chain Shimano 9-speed , Rear Cogs SRAM PG-970, 11-34 , Bottom Bracket TruVatiV ISIS GigaPipe SL , Front Derailleur Shimano LX , Rear Derailleur Shimano XT ,Shifters Shimano LX Dual Control ,Handlebars FSA XC-280, 25 mm rise , Stem Cannondale Holy HeadShok 31.8 , Headset Cannondale HeadShok Si , Brakeset Shimano LX ,Brakelevers Shimano LX Dual Control ,Saddle Fi'zi:k Plateau , Seat Post FSA FR-270

Its all going to cost however for a start you could look at your tyres & pedals

Maybe Schwalbe Nobby Nics or Racing Ralphs would save maybe 200 gms each
Pedals maybe Ritchy V4 Mountain or Crank Bros Eggbeater SL maybe another 70-100 grms

Also think about a Stans No Tubes kit maybe another 200 or so gms
Easton Monkey lite bars (-100+gms)

There's about 1kg plus for maybe a few hundred dollars