hey dude i train at the cribb with entity and you'll usually find some of us on site any given weekend, feel free to ask for a quick bit of advice. All i'll say is that unless looking like a soldier is important to you, go with a tournament style gun. Even if you never step foot on a tournament field they are lightweight, fast shooting, easy to maintain, comfortable to hold and air efficient over most scenario type markers. On that basis etha is an amazing gun for the money, so good in fact that its what i've supplied my entire university team with and usually recommend to anyone starting out.
That gun will do the job on any paintball field, whereas you may quickly outgrow the tippmann scenario guns.