I would consider the b4.1 rtr brushless version:
http://www.m-k-racing.com/product_in...oducts_id=7576
You will need a battery pack (go for a lipo, possibly saddles if you want to ever upgrade to a 4wd buggy later on, then you wont need to buy new saddles again), but make sure you get a lipo compatible fast charger (cccv method).
It will be more than quick enough for indoor and club racing, plus you can always upgrade the electronics later on should you wish, for not much (2nd hand racers gear is good, see the for sale section on here).
Apart from the shocks, and some small details (like some ball bearings, and turnbuckles) this is a great buggy, and not far off the factory spec car!
It also includes everything you need to 'race' on a budget bar the battery.
Note that it does use imperial screws, so getting a set of some decent hex drivers, and nut drivers is worth it if you want to keep the screws in good nick.
The car will come with some allen keys and plastic tools, but its worth buying some decent allen drivers to replace the cheap allen keys.
Check out the brca website for clubs in your area...if you want to race, I would also invest in a lipo charging sack, as this will probably be mandatory at a club you would want to race at.
Hope this helps
M.