I had a DB01R up until recently and it was a great buggy - get the "R" version though if you plan to race it - then before leaving the store make sure you have the 501x aluminum diff halves with you - you'll need them.
Otherwise the buggy is ready to race - the "R" kits include a slipper, CVD's, the better shocks (same used on the 511/502), and stronger plastics all around. It's better priced vs. buying all the hop ups afterwards.
The Baldre body is the other thing you'll need and is the better looking of the two options (Durga) in my opinion
