Hey there SCRM-R
With the paint theme you have going, I'd opt for the Arson wheels. That pattern seems to match pretty well.
Have you given it any thought on going with a 21'' front?
The 21'' shows off more of the wheel pattern and handles great. I have no regrets with my 21''. An 18'' w/ a 140 is a great choice as well.
If you go with the 18'' I'd be compelled to run a single rotor up front to show off your investment. That would look spectacular on your bike with the wheel exposed.
It doesn't look like you hold back at all when it comes to your scoot

So you could also go with a different front fender to expose the wheel even more. Maybe a fatboy fender?
Take a look at this thread by Don (iselbulls) You'll see some different looks of before/after photo's.
http://www.cvoharley.com/smf/index.php?topic=11746.0Extremes finished product is outstanding

Hope all goes well,
Grover