For me,it'd be the M/C,disc front brakes,roller wheel bearing conversion,radials,Halogen headlights and an alternator. All the rest is nice but more a personal choice kinda thing. The stuff I listed for a daily driver,unless you're willing to compromise a little on safety,comfort and convenience,are the minimums,in my opinion. Of course,with MY budget,the minimums are
considerably lower than that.

Speed