I think I'd agree with everyone else, that the dual strip, for 40W in total, would be the way to go. With the higher wattage lighting, you'd have to be more careful to get everything balanced (amount of light, ferts, etc) else you'll end up with a big algae bloom. (Plants need to have everything in the right balance to grow properly. For example, if you have too much light, in comparison to other stuff, the plants won't be able to make use of it, but the algae will.)
You don't need CO2 to have plants grow successfully, at least with the amount of light you're planning to use (40W). With the higher wattage of light of the CF, it's more likely that you would need CO2 to avoid algae.
Make sure that you add more Flourite; the amount you have in your 10g won't be enough for the new tank.
Sounds like you're well on your way to a nice planted tank!
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