I switched to the energy boost from the tempo 5 - but I never loved the tempo - always seemed too firm to me. I do love the boost midsole - but it is not firm like the tempo.
I also have the adios boost - if you have a large budget you could consider training in that shoe - it fits snugly and while it is a racing shoe...it's a substantial shoe. I really like running in it.
If you search for it there is a long thread from a month or two ago on which an Adidas rep contributed - you should take a look at it. lots of adidas ideas.
I believe there will be a tempo boost in January.