The bigger machine -- ALWAYS.... Never cheap out when it comes to tools. (Greg's rules!
)
You'll THINK you only want to do "sheet metal" -- but once you can actually WELD... you'll want to build a shop table - and your friends will have "fix it's" for you... and it'll never end. If you can afford the 211 - get it. I own a 210 and love it.
How's that Chad? :>)