Nice little import welder, make sure you buy one local if you can, so if you have a problem with it, you can get service. This welder is DC only, so no aluminium welding possible.
The Power Pro 164 has Stick, TIG (Both AC & DC) and a plasma cutter.
The PowerTIG Micro 185 is both AC & DC TIG and stick
Yeah, I did some research on these units.
Personally I would rather have a machine for each function, you can usually find a good used stick welder cheap, so don't worry about that, but a decent inverter TIG welder is not that expensive if you buy import, it gets more expensive is you want to weld aluminum, but being able to weld aluminum is sure nice. The first welder anyone should buy, IMHO is a good MIG welder with a gas bottle set up, a 220V unit. You can weld lots and lots of stuff with that, from car fenders up to 3/8" thick plate, and it is easy to do well, fairly clean too, no slag. Added bonus, most decent MIG 220V units will also run on 120V and you can reverse the polarity and then run no gas bottle with Flux core wire, this means you can do basic steel welding just about anywhere that you have 120V power, and you can do it outside with the Flux Core, unlike the gas bottle, which does not work well in a breeze.
The Next welder anyone should buy, IMHO is a good TIG welder that can also weld aluminium, so an AC/DC TIG, I'd want at least a 180 Amp unit. With that you get a stick welder too, that can run 3/16 rod for any heavy duty welding you may come across. With that welder you can weld just about anything, Steel, stainless steel, aluminium, copper, and even titanium (see how expensive the filler rods for that is!) you will need a gas bottle of Argon for any TIG welder, so add that into you cost as well, lease, rent or buy.
The inexpensive DC only TIG welders are sure nice, but I'd still go MIG for steel for your first welder, really is point and shoot.
YMMV!