My first ever marker was an Eclipse cocker with an E1 board. She was an absolute beauty but I had no idea what I was doing with it. And I still dont 5 years later. Cocker's take an inordinate amount of understanding and experience to fully comprehend and will bite you hard if you fiddle with them the wrong way. Bugger about with these markers and they will happily throw all of their toys out of the pram and spit in your face. Then, like me, you have to approach someone who actually has a clue with a sheepish grin on your face and desperation in your heart. You also suffer the incredulous look upon this seasoned players's face that says it all; "what the f**k were you playing at you cretin!"
Despite that I loved that cocker because it was a pinnacle of paintball history and I personally think every player should own one. Just so we can all experience it. My advice would be buy one, then watch every single video on youtube about cockers, read every manual you can and suddenly become best mates with a cocker buff. Id also suggest taking your time in choosing as there are a lot of cheap cockers out there. My recommendation would be to go for the Eclipse cocker, they're beautiful. However, be under no illusion, cocker's will not give you the reliability and tolerance of modern markers and will go wrong with surprising regularity. Should you decide upon uprgrading to the Eblade electric trigger then you must remember that the E1 version does not have a ramping mode, you need a Zero B or E2 board for that.
Id compare these markers to the old MGs. They're old, they're temperamental, but good god they make you smile when they work and its always good to know you're holding a piece of paintball history in your hands, even if it does weigh more than your car.