RE: CT4-S or The Matrix
speed is nice but first thing is first. when you are doing like 50mph and you swerve to dodge somthing like a dog or a kid for instance, that could be the end of your car. you are going so fast that the car will just start flipping if you turn it really sharp at those speeds.i have an Electric TC3 with a Novak Brushless in it and i hate goiing full throttle because it is just too risky. first time it happened to me a kid on a dirtbike came hauling butt down my street and i turned to miss him and i turned too sharp and my car went flipping like crazy (Stuff you would never see in Holywood) kinda flips.
Second you want to see if the parts are available in your area for the car if you break something. if not you could break something and have to buy the parts on interenet and it end up being a dust collector.
Third since you have never owned an RC Car i would recomend an electric so you get an idea of what you are getting yourself into. the only problem is if you want to go fast with an electric you are looking at spending at least $500 on a Motor and Radio alone.
if you want a car that is durrable i recommend the Nitro TC3 Plus by RC10. it is about $300 and it does about 50mph. it is a touring car. so with about an extra $200 in your pocket for upgrades later on down the road if you want em. as for buggies i dont quite know of a nitro buggy that i would buy.
i hope i helped you out.
Michael