Here's a budget option that puts out as much or more light. Up front I'll state that the biggest problem is the lack of a truly low low, and thus a shorter maximum battery life. That is a big deal if you intend to use it a lot inside your tent, but not an issue if it's used almost exclusively for hiking.
$16.60 Trustfire Z2
Skip the rechargeables...
$1.50 Titanium Innovations CRAA -- slightly dimmer than lithium rechargeable, but lower up front costs. Cheaper than lithium non rechargeable and nimh AA's too.
$3.54 head strap
Upfront costs are roughly $20 for a very bright light that has a beam pattern that's great for trail hiking. It has o-rings everywhere, so it should be weather resistant. This light with battery is actually lighter than the lights you asked about, and lighter than the lights I mentioned previously. It supposedly can use a regular alkaline/nimh/lithium AA battery. If you do buy this, remember that the light and head strap ship from China and can take a few weeks to arrive, so plan accordingly.
Fwiw, I don't have a Zebralight, but I do have this light. Two of them. If the lowest mode was much lower, I'd recommend it without reservation.