It seems there is a flashlight that puts out 150 lumen (rated), and a headlamp that puts out 45 lumen. Not sure which you have. The Magicshine has a ridiculous amount of output for the price. But another thing to consider when you make a purchase is to think of long term durability. Or at least a balance of quality vs. cost. Therefore I always look for the best price on the highest quality item I can afford at the time. An example would be the light I have. It's a Cygolite Mitycross, and it's a great compromise of quality and price. Esp. how I was able to purchase it. It listed for $200, and I found it on sale for half price.....then an additional 10% off with a code. So for less than $100 including tax, I have a well built light that provides more than ample illumination for my commutes. It's extremely small and lightweight, has lithium rechargeable battery, multi modes, and fairly long run time. No need for a generator. For reference to your Task Force it has 350 lumen, so more than twice the output and I'm guessing is a better built product.
My advice is if you are relatively happy with your Task Force right now, I would wait for the best deal on the best light you can find. Don't jump into something unless money doesn't matter to you that much.