I own a few, been crawling since 2006 when you had to scratch build your own as there were no crawler kits, but been a couple of years since I crawled in competitions.
I have a
Clod based 2.2
http://www.tamiyaclub.com/showroom_m...=77490&sid=297
Clod based Super
http://www.tamiyaclub.com/showroom_m...=77493&sid=297
and my competition Berg
http://www.tamiyaclub.com/showroom_m...=297&cid=85784
There has never been too much interest in competition crawling in the UK, South Derbyshire model car club used to hold monthly competitions on their purpose built course which were quite popular but they have stopped now. Usually the competitions are small get togethers organised by the people competing, you can see what's currently happening
here.
Looking at your shopping list you have both a Punk dig and two FXRs when you only need one ESC. The dig is used with only one ESC, the dig disconnecting the power to whichever motor you want to brake. With a 3 channel radio and two ESCs you would be running both ESCs off the single throttle channel with both ESCs connected to the input on the dig unit, a bit like powering a motor by having two ESCs connected to it. If you want to use two ESCs then you will either need the Novak 'the Dig', a radio with sophisticated channel mixing or a 4 channel stick radio so you can control both throttles at the same time.
For a servo there's the old favourites the Hitec HS-7995TG or HS-7955TG, or their better modern versions the Hitec HS-7954SH or the HS-7950 which both can run direct from a 2S lipo. A cheaper alternative is the Savox SC-1256, I use a pair of these in my Super and they manage to steer the 4" wheels no problem. You will also need a separate BEC to power the servo, the Tekin can't give out enough power. If you are using high voltage servos like the 7950 and you are running 2S lipo you can run it direct from the battery, but otherwise I would recommend the Castle Creations CCBEC as the 10A output means the servo always has enough power to steer.
For more help
www.rccrawler.com is by far the biggest crawler site although it is a typically american site, and if you are into the competition side then
www.rccrawling.co.uk will put you in contact with the competition organisers.