once again, go for the stick welder. You can weld well over 1/2" thick metal once you master stick welding. Sure it takes time to learn stick, much, much more than MIG, but it will be much easier to cross over into MIG and TIG later on. Plus, stick welding is stronger
Just more bang for the buck. But, if you know you'll never stick weld or TIG weld ever, then go for just the MIG.
Personally, I TIG and stick everything. MIG, well, uh, anyone can MIG, so I try to concentrate on something else when I build things. Sure MIG is faster, but I like the look of the TIG weld and the quality it gives. With the stick, well, thats what I'm good at, so I'm very comftorable with it, verticle, overhead, whatever. So thats what I use on a lot of stuff. Plus, with a nice 7018 rod, its awesome to see a pretty weld layed down knowing it took some skill to get to look like that...
Oh, another thing on the stick welder, its much more versatile. Let me explain...
-TIG attachment is less than $100 (minus bottle), regulator, say $40
-AC/DC+ and DC- Makes it very easy to switch the polarity for use on a wide range of metals and situations (and TIG welding)
-aluminum welding is a snap with the correct rod (assuming you know how to weld aluminum). no special gas, etc. etc.
-cast welding is achievable with nickle or weldmold rods
-there are a huge assortment of welding rods for just as many types of welding, from 1# boxes up to 50# boxes (unlike the expensive/waseful mig wire is when changing spools, and time consuming)
-with the correct attachment, its easy to arc gouge as well, try that with a MIG...
-the same basic Lincoln buzzbox design has been around for over 50 years, not bad. something must be good
OK, I'm done now
Rob