Hi Jinja
I have 3 Iwatas, HP-B+, HP-C+, HP-BC+, Passche VL, Badger 150, and Master G22. The Iwatas are very good brushes, parts are expensive to replace, but if you use it properly, they last for many years, I only change only 1 needle in almost 10 years because I dropped it on the floor.
the Passche VL doesnt give you fine atomization even for the finest needle provided even when new, it keep on spitting paint, i changed the cone and needle numerous times it got better at first and got worse again. using the same jar of paint with Iwata and has no problem. now i only use the Passche for primers and flats, which i dont care much for coarse and spitting paint that much. I dont know how so many people are swear by it. (not being offended but just curious do people who have Passche VL also have other brand to compare?)
Badger 150 works ok, but the problem is when pushing the trigger down, it wobbles left to right. its the design problem, when pushing down the trigger, there is some room around the shaft causing it moves left to right, which also shifts the needle to move left to right, so the needle is never centered when spraying. I compared it to the new ones at the store and seems like they are all like that. (unless they fix the problem on the newer badge, because mine is kind of old). Its performance is acceptable overall. Badger has the best customer service. they will fix pretty much every thing for you for free for non-neglagence issues, all you need to pay is to ship it to them, but I am not sure about oversea customers though.
My master is my all time favorite, i got mine used online, been using it for 4 years now, and i dont know how long the previous owner had it. It looks like a Iwata copy cat. its just as good as my Iwatas if not better. Parts are cheap, but I haven't change any parts on it yet. In the states, i think only TCB global carries it, i never deal with them, so i am not sure about the customer service. If you want to save money, I think Master is a good buy, the G44 only cost about $40, still cheaper than your airbrush and got Iwata quality. (if TCB global stand behind there products)
Looking at your airbrush, cost you ~$60 USD, i never used it before, so my word will not give good justice, but just by looking at it, its all plastic, it may not last long, and the performance probably not too refined. Spending 2-3 times more seems to be alot, but you have to think, a good airbrush probably last you 20years or life long, if you break it down, how much it cost per day?!
conclusion: if you can get free service oversea, badger is a good choice, because the cost for maintanence and parts can be a concern. if you are willing to spend more Iwata is a good choice (heard Eclipse is a good model, but never try one, only cost ~$100 so its not too much, since you are willing to spend ~$60 on a plastic airbrush. also the replacement parts is not as costly) For bang for a buck, go for Master you would love it.