Tippmann is an excellent company who makes incredibly durable and well designed beginner to mid range product.
Ask anyone and they will tell you the same. Their M98C is the AK47 of paintball being pretty muche found anywhere and everywhere worldwide. Got to any field on any day at any time and you will very likely see atleast 2 people sporting one and they are built Tonka tough. They have a whole line up of other products as well. You can't go wrong with a Tippmann.
As for the Pirahna, it's not all that notable of a marker.
They are out there but it's nothing of regard.