I'm sure Quickdraw, our other resident Terran aficionado here on the forums, will be along shortly to offer his opinion, but here are my thoughts (in no particular order):
-Carrier Support: You don't have any SRS capability in the patrol box, so it might not be a bad idea to go for either the carrier box or the assault fleet box and use the assault carrier.
-Reinforcement Box: This box gives you some good flexibility, as it gives you another Frigate option and a light cruiser and/or torpedo cruiser squadron. All of these ships can either be used in independent squadrons or as attachments to your existing squadrons, have some nice capabilities (like Torpedo Spook), and are awesome models to boot.
- Shield Cruisers: With Terrans having shields on everything, having some shield cruisers around to buff that ability can't hurt.
Hope that helps. Of course, given my W-L record recently, I'm probably the last guy you should be taking tactical advice from!