Nothern tool sells a great little 110V welder.
http://www.northerntool.com/webapp/wcs/stores/servlet/product_6970_200332691_200332691
Its on sale for $320 right now.
I have one and use it for everything. I got my welder and an auto-dark hood for under $400 delivered to my door. The welder comes with a gas setup too. I use c25 with .023 wire with much success on everything.
I think this welder is the same design as the older lincoln 135 welders. I like it because it holds a big spool of wire, has nice long leads and a nice long torch cable.
I have had ZERO problems with my welder.
Don't get caught up in the gotta-have-a-big-welder thing. I rebuilt my trailer, did all the body mods on my dodge, and fixed a ton of other stuff with this little guy. Get a good extension cord and make sure you have a good breaker and wiring to the plug in you use the most. I wouldn't hesitate to build an entire rock buggy, bumpers, or anything else with it.
Down the road I will most likely buy a TIG machine for the odd stuff and they make such pretty welds on any metal you can think of. The downside is cost, space, and power requirements.
If you just starting go with something simple, affordable, and practical.