On the topic of TM's plastic: I've had a great deal of pot metal crap rails and receivers snap on me. I've never had any of my TM parts snap on me. Be they my GBB pistols or my AEG receivers.
I know how you feel about a proper metal gun, though. I've got full metal pistols and TM pistols. One is for the feel, one is for the function.
And just an aside about the logical fallacy that because WE makes GBBs, they should be the best: they're not. :P
WE makes GBB pistols that are crap, compared to TM. They make GBBRs that are pretty good, though. They do also make AEGs, but they're less common.
Not only that, but most WE guns are poorly produced clones of TM guns. WE doesn't innovate, but they do have a lot of variety.
I get that you prefer the full metal feel, though. Especially as a newbie. The feel adds a lot of fun to the game.