Since you have a pancake compressor, you don't have to budget for one for the airbrush. I use a pancake compressor and pipe it into my man cave. I do recommend that you buy a pressure regulator for use at your spray station. A water trap is also a necessary investment, and both can be found for pretty cheap if you settle for a hardware store brand, otherwise you can spend upwards of $35 for a "airbrush" regulator and water trap.
So, you get to either cut your budget in half, or spend the $150 and get a top of the line airbrush.
Around $75 will get you a Badger 100LG or 105 patriot, the Iwata CR Revolution, or the Paasche Talon.
At the $100 point will get you into a Badger Renegade Velocity, or Thayer & Chandler Omni 4000 (owned by Badger).
Around $125 will get you a Iwata HP-CS Eclipse, Grex Genesis XG, Harder & Steenbeck Evolution Solo.
Any of the above airbrushes will do pretty much anything you set your heart on, as long as your skill set will let it!
There are others available at those price points and higher, but the ones I've suggested all have an excellent track record. I would see if someone close to you stocks parts (washers, o-rings and needles) for any of my recommendations, so you don't have to wait for an online store to send you a part. I tend to buy extra "expendables" and keep them in my toolbox, just in case.
For the record I'm a Badger man with two 100LG (Medium and Fine) 150 (Medium and I can attach the fine head from the 100LG and 200-20 (also shares the head assembly with the 100LG) in my arsenal. Badger's customer service is top notch and I highly recommend them.
But the big selling point is availability of parts locally. Chances are someone will stock Paasche, Iwata or Badger parts, and those are the three brands I recommend.