You need to compare the bigger model Lorch to the Kemppi and Fronius - the T220 model. Then you're only 10 amps down. Those machines are all in the same category, they'll all handle 1/4" aluminium easily enough.I like the miller as it's 280a but well over budget. Looking at the Kempi mastertig 235 or Fronius magicwave 230. I liked the sound of Lorch but its down 30amps on the other two options.