for fabricating on a car, id go for mig defnitly gas/gasless
and as for someone saying arc welders are crap all depends on what you are going to use it for, they all have theyre place
and the tig would be no good for panel steel (unless your real good) as they use alot of heat and youl just warp it or blow holes all over
was down at mitre 10 mega couple weeks ago, they had a new range of welders in that looked all good for the price (under $1000) for a gas/gasless mig, but in the end you get what you pay for