So I'm looking at either a Millermatic 140 or Lincoln power-mig 140c welder to start out with. Both fit my needs of being relatively compact, using a regular electrical outlet and aluminum capable with minor adjustments. does anyone around here have experience with either, or is there a consensus on the relative quality of miller vs. lincoln? The Millermatic is about ~$100 more expensive, I assume due to the auto-set feature. Is this really convenient enough to merit the extra price? Those are just the two models that were most readily available, so if there's something else out there to look into I'd definitely like to hear about it. Any other suggestions/general advice as far as what I should be thinking about as far as getting equipment together would be great also. Thanks all!