I like Dubnyk, but I do not think he is the answer in Edmonton (or anywhere else...). That being said, Bernier has the potential to be a solid number 1 goalie SOMEDAY (but when??)
Erhoff has his better years behind him, while Theodore could still give you solid numbers.
The 3rd round pick is a great upgrade for your 10th, but I feel that overall, this trade falls short.
I would gamble on Bernier and ride Theodore until Bernier is ready to take over the crease on a given team. Hopefully by then, Theo still holds some value (maybe get a pick or 2 for him).
If you are looking to rebuild, focus your efforts into landing a prospect that has little risk or avoid trading away yours.
Just my 2 cents
Keeper league (08-09 Champion)
16 teams (keep 18 NHLers, unlimited minors)
Scoring Cats: G-A-PTS-PPG-PPA-(+/-)-PIM-SHP-SOG-FW-GWG
Goalie Cats: W-L-SVS-SV%-GAA-SO
F: Brunner, Conacher, Adam, Nyquist, Phillips, Forsberg, Girgensons, Killorn, T. Johnson
D: Rundblad, Orlov, Sanguinetti
G: Greiss, Nihlstorp, Taylor, Zatkoff