Is there a reason you specifaclly need an adjustable focus light? Going with this type of light has a few problems.
1. If looking for a quality flashlight this will severly limit your options to choose from, due to most manufacturers not producing adjustable focus lights due to many different reasons. There's a reason why surefire, fenix, 4sevens, jetbeam and many others don't make adjustable focus lights, they are an inferior design compaired to the fixed focus design.
2. A fixed focus light that uses either a reflector or TIR optic is a far more useful illumination tool than an adjustable focus light. An adjustable focus light has no advantages and all disadvantages when compared with the flashlight standard, which is the fixed focus system. There's a reason why there arent' many adjustable focus lights on the market, they don't offer anything over a fixed focus light.
3. Having to focus a light only adds an unnessecary process in what I consider to be a flawed design. When you pick up a fixed focus light, I know everytime I pick it up it will be ready to use perfectly in focus with a good combo of throw and spill. When using an adjustable focus light, you may have to fumble with the bezel and focus it becuase it may be set to a setting which is unuseful for the particular situation. You hear a noise outside, you grab your adjustable focus light, hit the switch, oh wait, I had the beam spead out to flood last time I used it, now I have to adjust my grip and focus the light to throw. That will nver happen with a fixed focus light.
4. There is no situation I can think of where an adjustable focus light can do something that a fixed focus reflector based light can't do better.
Spin, if you can post back and tell us what your budget is they we might be able to make better suggestions for you.