If you've read my posts elsewhere, you probably already know that I don't subscribe to the "mech is dead" hype. 6th Edition has made vehicles more fragile in some ways, sure, but that just means that we need to be more circumspect about using them, rather than assuming that they are now completely useless.
That said.
I'm kind of wondering what to do with the Space Marine predator. I've never been fond of it. It always seems to me that if you want mobile firepower, you're better off with a razorback (less durable, but carries troops in addition to having some killy weapons options), a dreadnought (can hide in terrain, move and fire all its weapons at full BS), or a vindicator (siege shield lets it charge through terrain and carries a great unique weapon).
This is particularly relevant to me because my Mysterious Benefactor (MB) sent me a predator tank. It's a bit of a fixer-upper (not complaining - sometimes I think I like stuff that needs to be spruced up/stripped and repainted better than I like new models), and I'm considering turning it into a third rhino/razorback convertable or possibly even investing in the bits needed to turn it into a vindicator. However, I'd also welcome a general thread on the tactical possibilities of the predator tank.