The other issue about buying abroad is declaring what you bought when you return. In Canada it is $800 after seven days away. I have no idea about the US. Of course it is your choice to declare or not but to minimize hassles, you may want to declare.

Sorry if it's been answered but why can't you custom order in the US? I know when I ordered my bike, my five week wait turn into 13 weeks and I missed the summer months that counted.

After your trip can you post your experiences? It will be interesting to hear how you made out.