If you want to go down the magnetic path, here is a wide ranging discussion on Qupakoco's old Plog. http://www.lustria-online.com/threads/the-road-to-2500.10559/ This way you can store your army on the side of the fridge.
Heck yeah! Leave all your models out for display and annoy your significant other You can also just buy the big plastic ones from GW, but making your own is a lot of fun. Plus a magnetized tray is super easy to move around the board. No more worrying about your Standard Bearer falling over after a simple 4" move.