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Im planning on adding a wireless system to my next bot but am totally new to the subject. Ive decided on two transceivers for 2way communcation from both ends but have no idea which ones to get. Here are three possible options im looking into. My question is how hard is it to connect these to a picaxe and a computer and which one would be best for a beginner.

http://www.robotshop.us/sfe-nrf2401-trace-antenna.html

I have what are probably two very simple questions about picaxe programming. First how do I create a line of code that only executes once for example a noise that only sounds once when the robot turns on. And secondly what is the difference between the gosub and goto commands for picaxe. Ive refered to the manuals but have had no luck.

Im kinda new to this programming stuff so this is probably a really easy question. How do i get my robot to react to a increase or decrease of 20 points from my sharp IR. Right now  my code looks like this (b1 is IR reading)

if b1 > 115 then
 gosub TURNRIGHT
 end if

 if b1 < 85 then
 gosub TURNRIGHT
 endif

 my sensor reads about 95 when its on my black table but with different light sources or materials it can jump up or down. Instead of using 85 and 115 in my code i want it to react whenever there is a change of a specified amount.

Im pretty new to robotics ,about 3 mon experience, but ive already built about 4 working robots, i work 6-7 days a wk and dont have alot of time to worry about getting all my different parts together for building a new robot so i am looking at buying a vex starter kit. I am wondering what its mech, elec, and programming limitations are and what programmer to get if i buy it.