Hows the paintball scene in sweden? I know airsoft is big in europe, but I havent heard much from paintball. You need to make sure you have people to play with before you get a gun
Anyways, I'd get the A-5. Its very reliable so you wont have to be constantly ordering replacement parts for it. It is also capable of shooting very fast with an e-bolt/e-trigger/Response Trigger without needing a hopper upgrade as well. If you are going to get a barrel for it, it mostly depends on where/how you play. If you like to play paintball in big woods fields, the best barrel is the Tippmann Flatline. It is fairly expensive, but I own a flatline for the 98c and it is a fantastic upgrade. If you dial it in just right, it will shoot with a perfectly flat trajectory and very accurately. A regular 14"+ barrel wont make the ball shoot farther, but straighter. A flatline will make the ball shoot longer and straighter. If you are playing speedball it is best to get a shorter barrel for compactness.
Good luck!