If you've been out a few years, most of it will be very familiar, save the differences between carpet & dirt. Prices have not gone up, contrary to what's been written above. I'd recommend the Associated B6.1. It's fair to assume that this brand will be well supported anywhere you can find to race in the US and I feel that they do a better job than anyone else of putting the stuff you need in a kit (no need to radically change the setup with a bunch of aftermarket parts to be competitive) While the 22 4.0 sounds good for $200, it'll take another $50-100+ of stuff to make it run well on carpet.

Get a speed control that's rated for a little more than you're planning to do, something like the Hobbywing Justock or XR10 Stock spec is good, as is the tekin combo mentioned above.
Batteries are pretty easy- Hobby King Turnigy are good for the $$, as are SMC, Pro-Match.
Motor - Motiv are tough to beat. They hand-assemble + tune and prettty much give you what other brands sell as "Premium or Certified" at the standard price. Tekin Spec-r and Reedy S-Plus are also great choices that are reliably fast. I've been running Surpass motors lately with good success. This is a company that makes most of the other brand's stuff for them, but you'll need to buy from one of a couple guys here on RcTech. There's a thread on them in Radio/Electronics
Servo - as fast as you can get but whatever you choose must have metal gears. None of the current cars have servo-savers, if that was common when you last raced. Radio - shop around, the Airtronics MT-S is really good for the $$, but the rx's are a little pricey, if you expand to other classes later on. It's all pretty good. Decide on how much $$ you have to spend.