if your new to the hobby get a rtr, there realy is no nead to go spending a fortune on a top flight buggy there are a few decent ready to runs out there but in my opinion the best deal in the uk at the moment is probably this.
http://www.rchopups.co.uk/item--Spor...--SWK1225.html
decent chassis decent engine and a very good radio for a rtr.
don't fall for all the buy a kit because rtr fall apart nonsence your gonna hear its just not true.