I have both MIG & TIG. I use the MIG most of the time. I only use the TIG for alum, SS, & critical parts(steering etc.) The TIG is just too slow & puts more heat into the metal, thus more warpage especially on sheet metal.

I have used a lot of welders & prefer lincoln or Miller.

I have a 200 amp Miller MIG & a 250 amp Miller TIG. Both are excellent welders, however they are larger than the axerage street rodder needs. For the MIG I would NOT buy a 115 v model. I also would not go lower than 150 amps. Make sure the ratings are amps out not amps in. Hobart & most all off brands rate some of theirs at amps in so make sure you compare apples w/apples. Also chk the duty cycle.

For the TIG I would stay at least 150 & use a water cooled torch. This set up is quite expensive compared to the Mig.

Don