if its just for recreational use i would just just change your barrel, there are numberous barrels out there that do spyder threads - i usually wouldnt recomend one but i will say a freak in this instance as if you buy the full kit its only a barrel back to change the kit for a different marker. you will find that mot many upgraded markers share spyder threads (unsure on the wrath)
I wouldnt even bother with Air - although it will make a difference it wont be as noticable as it would be on say an impulse or a cocker. the issue with CO2 is its charge rate from Liquid to Gas which makes the marker inconsistant over the chrono and in real cold weather can tend to even not work as liquid stays in its form in cold (rareity mind) . If you intend upgrading marker soon, Air maybe an option though as you can just belt it onto your new marker.