as some of u already know that im soon going 2 b getting a mk2 golf gti!

, my insurance quote will only insure my providing that i hav a alarm fitted, and must hav the insurance aprroved fitted thingy! so this is where u guys come in as i know jack sh!t about alarms, apart from being told that i should get a clifford concept one,
how much would i be looking 2 pay 4 1? could anybody give me any cost? also how much would it cost me 2 get it fitted bare in mind that ive gotta hav the approved insurance thingy! wot about halfords? do they do a fitting servive?
thanks in advance

oh yeah wot alarm would u go 4?