I have an astro 130 amp mig. For the $350 (no tank) I paid about 8 yrs. ago, I'd say I got my $ worth. It is a 110 primary and works with a 20 amp circuit. Lincoln also makes a good one and you can get it and accessories at the **** Depot. For a tig, I hunted around and bought a huge old lincoln arc/tig machine from a local fab. shop that bought some equip. It was already to go with a cooler, torch, and pedal and got it for about $1500 without the argon tank. If you buy used, take a buddy who can weld well and try out the machine to be sure it's O.K. For the big tig and migs you will need a 50amp 220 circuit. the larger (220) machines definately work better and get more penetration. If you can afford the better machine buy it. I've also used a small tig by miller. Works o.k. on thin stuff, up to 1/8" or so steel or moly, but is not so good on alum. Best prices I've seen online were at weldingmart.com. Hope this helps. MIKE.