I'll say the same as everyone else...BUT....
There's a ton of info online as well, to help you set up other brands. It can be kind of a circle from what I have seen, because of "local support". In other words, a never ending circle of the same cars because of what's already at the track and local support.
With that being said....
I just went through the same process that you are now x 4 as my gf and step kids wanted in as well. I went with Serpent SRX RM's. Picked them because they have great performance, are super durable, and have great pricing when a used one comes up, as they aren't as popular. As long as you aren't at a super nerd rc cult track, most guys will be willing to help you regardless, and being your location I can promise you that many will be interested in a "different" buggy that they haven't seen much of.
Just 2 cents from another noob that's about 4 months into the process/learning experience!