An Ebladed Cocker would be absolutly fine for Rec-ball or Tourney-ball, they are fast, effiecent (and of course have magic which helps them be more accurate
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They may not be the fastest markers on the planet but plenty of people use them so they can't be all that bad.
Cons I would have to say is that if they go wrong it can be a pain in the ass, but it dosen't happen often. Oh and remember to take the battery out after you use it because the E1 frames suck the life out of the batteries
Pros would be speed, ease of use, won't break balls, and when they are set up correctly they will be perfect!
An Eblade is the electronic trigger frame fitted to Cockers, this allows you to shoot faster and have a much shorter trigger pull than a mechanical trigger (also stops you "short stroking" the trigger ie. pulling it incorrectly). Eblades are also fitted with eyes which will help prevent you breaking balls.