the xr10 is the best out of them, but its 500 bucks without electronics. i would also say not to got the losi minis cause then you will need to search more for an appropriate terrain. but if you will be using them in your house and on special little courses, ya they will be fun. I would recommend something bigger, like the MRC pro which you suggested, its a good comp crawler and Jeremy and Brandon did a few videos on it that you can go check out. and a suggestion for electronics, a good tekin 35turn motor and FXR esc combo would be great, a good Savox SC1268SG or the Savox SC1256TG would be awesome and grab some decent crawler tires and you will be rockin.