I'm looking for a gas heater for my pool... I currently use a MinMax

Hayward or Jandy are two of the most popular ones available. Either one is a good value...

I have a heat pump pool heater on my 16 x 32 in-ground! I would never go back to a fuel burning pool heater! They just use way too much fuel!

Heat pump pool heaters are more expensive to buy, but your operating costs are next to nothing. Basically all they have is a fan and a compressor to run, so it's using about as much electricity as a deep freezer when it's operating. A propane or natural gas heater is going to be somewhere between 250,000 and 400,000 btu's depending on the size of your pool. Let's look at that for a minute. The average furnace is about 80,000 btu's so you will be using anywhere from 3 to 5 times more fuel than your furnace does when it's operating!!! Run a 400,000 btu pool heater for 5 hours and you've burnt about $50 worth of propane at today's price.
Hope this helps :D

The Hayward H-Series heater represents the very latest in heating technology for swimming pools and spas. Features include: digital touchpad display rust-resistant water path rapid-heat combustion chamber The Hayward is also easy to install and maintain. This would be a great thing to have in your pool for the cool nights that you want to swim.