I have a Magicshine and a P7 flashlight. There are US dealers for both, which will get you your product in just a couple of days, or DealExtreme, which will almost certainly (but not for sure) get it to you in less than a month.

www.geomangear.com has both Magicshine headlamp and the flashlight version. A few bucks more, but ABSOLUTELY worth it for the shipping speed and for the customer support. I buy from DealExtreme quite a bit, but for this I went to GeoMan. I generally buy from DX for toys that I don't really need right away and don't particularly care if they show up broken.

My feelings: I mount my lights on the bar. If I were doing it again right now, I'd go for the flashlight. I find that for my ROAD RIDING, medium mode on a P7 is enough, and it gives me 2+ hours of runtime. And, it's waterproof.

The headlight is great, 3 hours runtime on high, but not waterproof and more screwing around to mount.

The flashlight is a little cheaper, typically $65 or so from DX (I got my P7 flashlight from DX since I was just experimenting and didn't need it fast) including 4 batteries and a charger. The headlight cost $85 from GeoMan.

So it comes down to whether you need waterproof (do you ride in the rain), how long you want to wait, whether medium mode is good enough for you and just over 2 hours runtime is enough (or if you're willing to stop for 45 seconds to change batteries in mid ride), and how much you care about wires running around and having to find a place to mount the lighthead and the battery.