the best research u could do about finding the right buggy is:
1)budget
2)parts availability
3)price of replacement parts
most bang for your buck as a rtr...prolly cen matrix.....my first was a ultra comp spent more time on the bench than on the track,next i had a ofna worlds 2 a little better put a hyper rear arm and big bores great car,next mbx5 durable heavy and diff seals wear fast now caster zx 1 pro not broken yet....oh yeah if it can b broken i can break it.....and thats the truth