1/10 will be better it is most commen and easier to get parts for. my personal favorite out of all the rc cars i have driven is my stampede 2wd brushed was decent fun in the street because you can ride wheelies. then when i went to brushless (i did not use the traxxas setup i used cheaper one that works really well) i can barely keep front wheels on the ground. not many rtr's come with lipo but you can use lipo with any just by using lipo alarm. sounds like you might want a traxxas slash or traxxas rustler. and as long as you know how to solder it is much cheaper to buy brushed and upgrade

2wd brushed traxxas is about $200