Matte black is really nice as long as you do it right. It has to look factory and that means tank emblems and proper decals. Matte black can look way to Mad Max way to fast.
Yes that is the fiat color. I suggest it because its totally different. Purples will get old way to fast, gloss black is everywhere since its the new chrome and matt grey is cool but again, it has to look factory. My good friend did his Ducati GT1000 in that latte color and it was absolutley amazing with the black rims, gold forks and black exhaust. So different and something daring.
Here is my 02 Speed Triple I painted two winters ago:
I tried to make it as factory looking as possible by using factory decals from the 15th anniversary speed triple in gloss black and gloss red outlined. I did the stripes in gloss black and pinned with with gloss red all on the matte black.
Whatever you decide the fact that you putting so much thought into it is a good thing. Whatever you choose you will do it right.