Gamestop is offering you a fancy new gun and armor for pre-ordering Mass Effect 3 with them. Add in the collectors edition and you have yourself a fancy collection of Mass Effect goodness. The collectors edition includes the following for your $80.

Premium metal case featuring male and female Commander Shepard
70-page hardbound art book
Limited edition Mass Effect comic by Dark Horse Comics
Fabric N7 patch.
Exclusive 4×6 lithographic print of the SR-2 Alliance Normandy
Additional in-game content including
N7 Arsenal Pack – Bring the firepower with the N7 Sniper Rifle,
Shotgun, SMG, and Pistol.
Squad alternate appearance pack
Robotic Dog for on board the Normandy
Mass Effect 3 digital soundtrack.

Gamestop appears to be the only retailer at this time offering a pre-order bonus making the decision that much easier.

Source: Gamestop