Me like many other Terrans are sick of going mass bio. So i've been working on BioMech and found out that Marine Tank Viking with Heavy Upgrades works great. Jinro has also demonstrated recently the power of PureMech with Heavy Harass.
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My Replays- I prefer a 1 rax FE throwing down 2 more raxes and then 2 Factories(used to get 3 but cut it out for faster upgrades) and getting fast upgrades. Then adding a 4th rax and Reactors. Later adding Vikings
Replays
Currently I'm working on adding Harass and looking for timing windows. Hope these inspire someone. This is my style and currently works for me. It may not work for everyone. And i'm still improving my game by adding harass. But right now my Macro is my strongest aspect and i'm abusing that with my build.
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Jinro Vods-
http://sc2rep.com/replays/show?id=4470
http://sc2rep.com/replays/GSL2011JanCodeSRo16GroupD/4472
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Also if you have been watching Liquid'Tyler's Stream you will also see how alot of Korean Terrans are going Mech/BioMech.
What do you think? Personally i find these compositions viable. Yes its harder then Bio, but i believe it is necessary to learn in order to compete with Protoss L8 game. This is not to say one can't open 3rax/2rax bio and transition into Mech/BioMech. You don't have to open straight Mech.