Hello,
I'm currently busy with the 2003 Italian GP version.
http://www.automotiveforums.com/vbul....php?t=1086938
I used the Tabu decals-very well printed and easy to use. It is a bit thick in my opinion.
The standard Fujimi sponsor decals are not entirely opaque so I'd try and get the Museum Collection decals if I were you, their decals are much more opaque but you would need to do some cutting to make the Marlboro logos fit the rear wing as it seems they are printed for the Italian version. They do supply extra Marlboro decals that you can trim.
The F'artifice decals are made for the MFH kit and might not fit very well.
I have never used Acu Stion decals, so I can't comment on them.
I hope this helps.
Let me know if you have more questions regarding this model, I have learned some lessons from mine that can hopefully make building yours easier.