How do I choose the right welder?

[blazerboy_4life]

I know there are plenty of other threads out there about what welder to choose and why but I am having a hard time with this. I need something for body work and small projects like fabbing up some new trailing arms. It has to be 110 and I would like to be able to use it on aluminum too but i dont know if that is possible in my budget. I know if you look carefully you can find what seems to be a decent welder on sale or clearance for $100-$150. To be honest im looking at one in harbor freight right now for $99 on sale. I would prefer wire feed. Also are there any brands that I should consider over others and some that I should stay away from all together? Whats the difference between mig/tig etc...Thanks in advance everyone.