I know MSU worked for BT players in the past, paired up with a Razorback.
Honestly, with 7th Edition rolling out at the end of the month, I'd focus on painting what you have (assuming you have things to paint), and conceptualizing how you see them on the field. Are you looking to play a Uber-Competitive Templar List? Or are you wanting to play something that fits your vision of how they are portrayed in Fluff? Not that these things are mutually exclusive, they just tend to be. IIRC, Templar are the only Marines that have the ability to Las/Plas (or dual weapon period) with 5man Tactical-type Squads. ADL give you the awesome benefit of an additional piece of Cover providing terrain to help protect your gun line/advance across the field. I found in past editions, going 7 Marines/3 Scouts worked better for me than going 5/5. Has it been working decently for you thus far?
Running Tandem Land Raiders with 5 drop pods gives you a great Hammer and Anvil that forces the other player to really consider target Priority. It also gives you the flexibility to decide if you need more Marines at the beginning or if your Dreads will better serve what you need. But that's also the way I tend to play in general. My Nightlords use Huron to put d3 units in the opponents face while the rest of the face of death comes billowing their way.
So, I guess, how do you see yourself having the most fun with the army?