oldbluetruck,
It appears you have given up on the used welder and starting thinking 'new' mig...good choice.
I didn't investigate the specs on the welders you noted in your post. They are probably quite similar to each other.
My thoughts would be this. You can shop price, but as a green pea, you also need service and guidance.
If you have a welding supply house in your vicinity, see what they have to offer, and see if they will try to match a reasonable 'discount' price.
They will have all the consumables and parts for the welder they supply...plus free tips and troubleshooting. You not only get the welder, you get all their experience too.
Realistically size your machine and make sure your shop has adequate power for it.
Be sure your machine will have the shielding gas capability...this is a must.
Good luck and keep us posted!
Stuart
