Hi Wee Rocky and welcome,
Seeing as you're intending to have the slip on kit fitted, wouldn't it be better to go for the full monty because if you decided at a later date to do that upgrade,unless you're doing it yourself,the labour involved is pretty much the same.To make it work properly you would have to run a can all the time though.Just a thought,as I don 't like to see good money wasted.