i liek your choices if you want a more economical a arm setup id recomend burgard or america star (im not sure thats the exact name)
and on the exhaust front i love my yosh
im in the same boat but ive laready spent the money muiltple thousands on a 300ex
id also recomend a gearing change to 14 26
300ex edlebrock flate slide yosh pipe razr 2s all around k@n filters and out wears lonestar stearing stem bearing carrier and clamps srp bars ac nerfs lazer star light bar and lights ebc clutch wesco 11:1 piston .336 billet powroll cam kibble white valve springs works clutch lever lsr carrier 400ex pro flow with outer wear elka front shocks and works rear shock srp 400ex bend bars 909 grips trail tech computer maier blue plastic with 250r hood scoop jt chain and sproket(14-36) srp brake rotor ebc brake pads all around hd in back and carbon in front jbh oil cooler, amp link chain guide. AMR ignition system