Darkwinter....
I picked up a second hand e-blade and haven't looked at anything else since. It is well worth getting an electro, even if it's second hand or a new model from a cheaper manufacturer. It doesn't have to be an angel/shocker/e-blade/ego etc.
It'll stand you in very very good stead when it comes to shoving paint down the field at the opposition.
Check the forums here, and a bunch of other places, an angel LCD/LED would be a great starting place as would an E1.
Orrrrr, there could be a specific reason you want a mech cocker, in which case (and getting round to the point of your post
)
I'm not sure of the difference in the trilogy.
Haha, glad to be of little help,
Chimp