Here are some sites for companies big in r/c:
http://www.tamiya.com - One of the biggest names in the r/c business. Good entry level cars.
http://www.kyosho.com - Another big name, also good entry level cars.
http://www.hpiracing.com - More race orientated cars, spares service poor in uk though. Also offer a wide range of bodyshells.
http://www.towerhobbies.com - An american online hobby shop, good range avaliable.
Option2, chances are that if it is $19.99, it's probably a 'toy' r/c. This means it will be slow, impossible to upgrade and not very strong. Plus if you break it, you won't be able to get spares. There are plenty of different shells avaliable, many on the same chassis. For instance, the Tamiya TL-01 a good, easy to build, fully upgradable entry level 'proper' r/c is avaliable with a wide range of shells. For instance you can get the R34 Calsonic Skyline JGTC, Tom's Castrol Supra JGTC, Subaru Impreza WRC, Ferarri 360 Modena as well as plenty more (check the Tamiya website for the full range). You do paint the shells on the inside with a special flexible paint although it is not too hard to do. Also many shells come with plenty of stickers so you can get a good looking shell by painting one colour and adding the stickers. The shells are pretty bendy although do crack over time although they are less than £20 to buy in the UK (check tower hobbies for US prices).
Selecting the chassis is the most important part when deciding what car to buy. Most good touring or rally cars are 4WD now, with only a few being FWD. I personally prefer 4WD to FWD or RWD as even the entry level cars will do 20mph out of the box. I have 2WD cars and you end up with wheelspin half the time, with 4WD you have much less. Thats not to say they aren't fun, you can get into some awesome drifts if you want, it's just that 4WD makes the car much nicer and easier to drive. In terms of price, you are looking about £160ish pounds for a good entry level 4WD touring car in the uk. At a guess, you will be looking at about $160 as kits tend to be cheaper in the US. Make sure you get a deal though, if you get just the kit you won't have radio, battery or charger in the majority of cases. Read what you get for the money!
The Tamiya factory is in Japan (I am pretty sure) although there are distribution centres all over the world (correct me if wrong
I don't want friends!). I wouldn't worry about going to the factory, they almost certain would sell direct anyway. Your best bet is a local hobby shop as they will be able to give advice face to face, or get your stuff from tower hobbies. I work in a model shop and plenty of people here have cars so advice is not a problem. If you are looking at running your car off road, I wouldn't get a touring car though, they are two low. Rallycars are avaliable if you want something that looks like a car but can do a little offroad. If you want to go serious offroading though, a buggy or moster truck would be a better bet as they are designed to cope with it. Whatever you get, don't run it in sand! That is unless you want to frequently strip the car and replace parts, it accelerates wear very quickly!
Hope this helps
mr_p