Airsoft Sniper Rifle Help?

I am a one year airsoft player and looking to become a sniper. I am looking at the AGM l96 AWP on airsplat the echo1 ASR on airsoft station and the will mbo5 on airsplat and i was wondering which 1 was the best gun for the price. i want a scope and bi pod so account that in to the price i also want to upgrade eventually but not right away so if you could list a url for a good upgrade package or parts that would be good or if you just have details on these guns that would be great to. thanks!