electric guns (AEG), are better then spring guns in construction, durability, and power... if you know what brands to get. Echo 1, JG are good for there prices. then you have the higher priced guns like classic army and tokyo marui which are good if your into upgrade your guns and know what your doing. VFC also is a good brand but is high priced. there also the most realistic when it comes to materials and weight of the gun. another thing you want to look for is the type of thing your going to be doing most (room clearing, sniping, support etc.) if your doing room clearing, you want a shorter barreled gun like an MP5 so you can easily move from room to room. if your going to be a support gunner, an M249 saw or an M60 would be the better choice due to rate of fire and ammo, all tho those guns are usually between $400- $1100. then you could get an M16 DMR (Designated Marksman Rifle) or M14. what ever suits your preference.

i like AEGs,but if you prefer GAS thats KooL too, there are some springs that have a high FPS, there are pros and cons with both gas and electric guns, you have to keep a supply of gas or batteries on you, but lots of fun either way,and now some guns have the blowback feature!!