If you're 18 or older, get age verified, there's tons of retailers who have alot of stuff and, at times, will even do custom oreders that would allow you to order an EBR or in the even you just get an M14, allow you to get an EBR kit for it.
Best things you can do are:
Read the FAQ:
http://www.airsoftcanada.com/forumdisplay.php?f=21
Contact an Age Verifier to get age Verified
DO NOT buy from outside Canada, chances are you won't get your gun
As for what I run and my Experiences, I run a WETTI/AWSS M4A1 Carbine I plan to turn into a C8 (Also a reservist here, so I've gron fond of our weapons) A WE SCAR-L, an AEG M4 and a TM Pistol
As for my experiences, so far the majority of my airsoft experiences have been GREAT, I've mainly played with a certain group but I've also attended games by other hosts and they were great too