Bboard, I have been running jammin prod. for a few years now x1x cr buggy X2 CR buggy x1crt and now x2 crt truggy. The x1x buggy is a great buggy. I ran the x1x buggy all lastracing season and never broke a single part on it (and I do like to crash big). I had a servo go bad but never actually had a single problem with the buggy. As for the kyosho I have never driven. I''ve seen the new MP9 run and it looks like a great buggy. To get started you need a bump box a couple 7.2v batt. or 12v., servo's there are several good servo's I personally run the JR9100 SER., ACE DS1015'S and a few dif. digital Hitec's, engine a few that I have ran and had good luck with are the Jammin JPX.21 & jpx.28 great engine for $225, GRP .21 & .28 these engines have come down in price but are still a little on the expensive side, you will need a engine mount if it does not have it, one piece prefered, pipe there are a lot of good pipes as well, I personally run the dynamite 053 and the ofna pipes JP3 & JP4, clutch sys. if it does not allready have one, and a good set of tires, I like to run the prolines & AKA'S. If you allready have a transmitter and a receiver other than fuel and receiver batteries I think you should be good to go.
Probably for got a few small items but that should get you started. Oh ya RB engines are known to be a good quality engine( BUT BE CAREFULL BUYING A USED ENGINE)