Magic the Gathering Precon Help?

I'm getting a new MTG preconstructed deck, but I'm not sure which one to get. I play all colors and combinations. I am looking at Life Drain from Eventide, Overkill from Shadowmoor, Transference from Darksteel, Snowscape from Coldsnap, Selesnya United from Ravinca, and Sliver Evolution from Time Spiral. I would much appreciate it if you could list what, in your opinion is the best, down to last. Thanks!