I had a whole list of upgrades to get for my G&G as it breaks down, but after examining it, I don't like the external QC at all, going to sell it after about 5k bbs and buy something better. Most likely TM, VFC or Magpul.
All joking aside keep the G&G even if you get a second aeg it will make a solid back up. Dont buy a VFC good once not anymore I would rate G&G higher. TM, Pts Rm4, Krytac or Real sword are the best places to go for a good quality aeg. G&P and the higher end Ics guns not far behind.