Thanks everyone for the interesting feedback. I am swaying towards the Wildcat Evo, however I only have about 170mm of barrel length from the end of the stock to the end of the barrel. The Wildcat extends over the barrel 160mm leaving a 10mm gap between it and the stock.
Would this leave me enough room and sufficiently recoil etc or should I go for the Jet Z which extends away from the barrel?
Thanks again for all the replies, valuable information.