Depends how much you are willing to spend and how much you take resale value into account. And yeah, don't try to order a receiver.
Going with either a CA or TM would give you as good a chance of a wise purchase as the other. Depending on the model of gun you are looking at (such as the M4 series) I would personally recommend the CA as the M4 from TM is notorious for its shoddy design leading to numerous physical degradation and damaging of the body, whereas the CA has come a LONG way from its state of having to rely on its metal body as a selling point to counter the TM in the market.
So depending on what gun you're looking at, try to find some reviews online and make a decision which warrants your money more than the other.
Originally Posted by sewktbk
you should consider WE as well in the mix. they make good guns.
Hes looking for an AEG, not a gas gun. Given how new this person is I would advise he not venture into gas guns as they are money pits and would be better suited for someone with more experience especially with repairing them.
Originally Posted by Brokenwings
good points. thanks. what about WE?
also, do full metal guns function perfectly fine with plastic mags? or could there be some troubles with them
There is no reason plastic would be an issue, but different manufacturers of mags may or may not be friendly with your setup. There are some brands that are known to just not work together (can't think of one off the top of my head at the moment) others are trial by fire. Get a hold of someone elses mags and see how they mingle and go from there.