Doing the rear FZ1 shock swap is cheap and easy, and there is no modding involved, just bolt it right in! You will notice a pretty significant dif in the ride. Doing the front, I would suggest saving up and buying a complete front end off an R1. 04 on up will work. You need the forks, brakes, wheel, axle, axle spacers, and front fender. Usually you can piece these out for around 600, or try and get a whole unit for around 750-800. After that you could go back to your rear, get the Satan666 adapter and put an R1 rear shock on. Your bike will feel totally different once you get these mods dialed in!
DJ