Hi I am new to the forum, I live in Connecticut and I build all types of hotrods, I've been using a Miller matic 35 and would like to step up to a tig welder,it will probably save me a ton of money in grinding discs (you know what I mean) I was all prepared to buy a Miller dynasty 300DX until someone recommended that I buy the synowave 250 DX , being that I dont know allot about tig welders I would really like to know the difference between the 2. What features does the 300dx have that the 250dx doesnt? Any help would be greatly appreciated. thanks Dave