I've got a Tokyo Marui Colt M733 AEG myself, it's sweet. For playing outdoors doing skirmishes one of the electric SMGs or rifles like this is better. For just plinking around in the backyard the gas blow back pistols are probably better, since the blowback adds a little something to the fun/realism IMO. However you have to take buying gas all the time into consideration. It's not expensive but they don't really give it away either, adds up. Where as a AEG is more expensive to start with, all you buy is BBs since it runs off a rechargable battery...
I originally had a gas blow back KSC Beretta M9, it worked great and was plenty of fun to plink around with, but I was getting outranged and overpowered trying to play with a bunch of guys all using AEGs, so I sold it to fund part of my AEG. A buddy had/still has I think one of the KSC Glock 18Cs, probably the model you're looking at. It was killer fun to shoot, worked nice. He added a metal slide and it felt even better...
Pic of my M733:
BTW, I see you are in Georgia, there is Airsoft Atlanta storefront that is not too far away from you, can't hurt to go check it out.
www.airsoftatlanta.com I got my KSC M9 there for under $100. One of the KSC guns is a good choice since they have adjustable hopup (backspin control on the BB) and are generally pretty inexpensive, whereas most of the other brands models in their pricepoint have fixed non-adjustable hopup... Steer clear of any of the non-gas blow back pistols though, the cheap springers are crap, and the electric blowback ones suck too.