I re-read your post and realized you want force on force training? Do you want realistic weapons? They have some like the tippman Alpha black and some magfed platforms but they do not live up to the hype, with short lived C02 cartridges, low power, low magazine capacity and high price tag for multiple mags. If you want to do senerios where you would like to be as "real" as possible the these may fit the bill. The problems is while they look cool- they suck.
Money is best spent with airsoft then you can shoot plastic bbs at each other and rely on the honor system
resale value is much higher with airsoft. At the local field I have yet to see anyone with a mag fed marker.
If you want a tank powered marker I would stick to traditional markers from the big names such as Planet Eclipse, Empire, Tippman. Steer clear of the Dye brand. The company is going away and support is now zero. The only Dye product I would recommend would be the Rotor as it is hands down one of the best hoppers on the market. Someone will buy Dye but for now the company is in the beginnings of bankruptcy.
Tippman while not real flashy they work and is what most fields use as rentals. They just work and can be upgradeable to suit anyones need.
I'll say it again the best value out there is the Etek4 paired with a peanut tank and a Dye Rotor you will be ready for most tournaments with that set-up.