I would say spacers. Not being able to clear those small brakes is just the wheel not fitting. I would really evaluate before going forward with this while you can still sell them before you start making changes for them to fit. Even without spacers the front track is going to be a good bit wider than the rear. I know you are probably excited about the wheels but if they don't fit, they don't fit.

The 5mm spacer is about the size of three CDs on top of one another. You need to be able to tell how much room you need. If you have to go bigger than that, you have to start considering longer studs, and wheel bearing wear. Check with other Honda guys (that know what they are talking about) but I would think about 7mm is probably the most you would want to put on the stock studs.