i've got the same set up as junior senior
but i've got the neuspeed front instead of the R32
I would definately get the arbs fitted first then see how it feels
(thats how i did it) but do get both cos if you only fit rear i think it gets swichy
then i just fitted
coilovers for astetics and cos standard ones are **** ha
As for spacers i got 20mm on back but currently none on front
but i would not go no more than 10mm on front