I would error on the longer side for a U lock so you can use the locking technique I showed before which is this: http://www.missinglink.org/page/how-lock-bike If you error on the short side you will wish someday you haven't when you try to lock up your bike to something it can't reach. Just a thought.

I would not trust a pitlock to secure my front wheel unless the wheel is not all that expensive, not sure if the pitlocks justify the price for what they do, but having no experience with them or ever known anyone who has I can't say with any degree of certainty. I would rather spend my money on the U-bolt as discussed plus add a OnGuard armored cable lock and lock the bike up the way the website shows, or use the U-bolt as the web site show but leave the front wheel on the fork and use the armored cable to lock it and the frame to a secure object if for some reason putting the wheel to the rear and locking it with the U-bolt didn't work.

But that's just me, we're all different and if you feel a U bolt with pitlocks is the way you want to go then so be it. I don't think your going to run into any problems doing it that way if your area's crime rate is medium to low. If I lived in a high crime area I would buy a beater bike and use that to lock up outside like I did in college. All the offices except for one I worked in I could take my bike inside with me when I commuted, so locking it up outside and worrying about it never was a problem for me. One office I did work in would not allow me to take it in because I was on the 25th floor and they frowned about taking it on the elevator, but the security guard had me lock it up out front and he could see it constantly from his post.