My 2 cents I like any of the small AC/DC buzzbox welders (e.g. Lincoln AC225/DC15, Hobart Stickmate 225AC/DC160, Miller Thunderbolt 225AC/DC160, or alternatively the older Miller Thunderbolt 225AC/DC150 which has crank on top).
While your price looks very good for a new unit and I am a huge Lincoln fan after previously owning a Lincoln AC225; I would put a bit more cash with it and and pick up the Hobart Stickmate if you are just dead set on purchasing brand new unit (best guess would be $440 or so on a TSC sale). The Hobart gives you infintely adjustable amperage control at the single amp level over the Lincoln which will be tapped in increments of 10-15 amps per setting. Also you get a few more DC amps with the Hobart. Miller is exact same welder as the Hobart but will cost more as you will have to buy through LWS.
Myself: I would not purchase any buzzbox new. This things are nearly bullet proof and last forever you can pick up a clean one used on craigslists for $200 or so with careful shopping. When shopping used though might be less picky on the brand and snag whichever in good condition at a good price.
AC is usually only an advantage in welding when fighting arc blow around magnetized metal. DC is slightly easier to use in ALMOST ALL other welding circumstance (DC is roughly 15% to 17% more efficient than AC). That said I have yet to weld at current higher than 140 amps on DC although I have used my buzzbox to crude cut at higher settings and AC works fine for this. Heck any of my welding is not any better on DC than it is on AC, but that is not saying much in my case, but DC is slightly easier to use. If buying on the cheap, I would not be afraid of even an AC only buzzbox but I would not buy a new one and I would not pay over $125 for one used. If your budget can afford it go AC/DC as it is more versatile.
Also you will need AC tranformer type buzzbox machine if you want to try Twin Carbon Torch as a nearly free way of heating metal for bending, brazing, silver soldering, freeing rusted nuts if oxy/acet is not available. Inverters will not work for Twin Carbon arc torch. For the record there are no significant hazzards regarding a Twin carbon arc torch as long as you cover all exposed skin, wear your welding helmet, and do not breath the smoke - or in other words all the exact same practices that should be followed if you are simply welding.