I can tell you from exp. that you do not want to purchase a mag of any sort. they are too heavy and you will chop balls. it isnt the gun that makes or breaks the team its the player. i have been playing for three years solid now and i have the means to purchase and play with all sorts of guns and markers.
i have also played in all kinds of tournements (mainly speedball type capture the flag events) and i have seen all kinds of markers being used out there. i have seen people using angels lcd and get taken out and i have seen people using spyder single trigger compacts that were absolutely unbeatable.
so what you are really asking is what type of marker should i get to get the same looks as the other players on the field.
I would recommend a cocker, depending on the $ amount you wanna spend. You can buy a 2001 vertical feed cocker off the net for around 350.00 or if you really wanna shoot the wad then you can go to your local paintball store and have the guys there build you a custom cocker of your specs and colors.
these guns have performed the best for me in tourney play but keep in mind they are one of the most difficult markers to dial in and work on so be prepared.
Personally it is not worth the headache to me anymore and ill stick with my mod 98.