I like the first one also - it's got nice visual interest and depth.
I do all my "rough drafts" for clients in Corel, it really has sped up my estimating process. I have now also instituted a $50 "art charge" which will be taken off the final price of their bike/helmet/vinyl job - I did it because I have so many requests, I can't afford to waste time creating graphics for someone who isn't serious about actually getting the art done. Some folks have requested artwork for their "bike", then I've seen the art on a tattoo site! No freebie rough drafts any more.
I don't envy you prepping all those parts! I'm cussing by the time I'm done with two fenders and a tank.

That's why I have my hubby do all the prep work, I do the art, and I farm out the clear coat to a local who does superbly clean work.
I can't wait to see how the bike turns out - good luck with it!