Hiya Dan,
I guess you must have bought it by now since 4:30 was hours ago. I haven't used T8 since the 20th century. I hope you're not going retro on us - I don't wanna have to look at pictures of steel rimmed tanks decorated with a pirate's sunken chest and populated with kissing gouramis...
In any case get whatever color and brand you like because it won't make that much of a difference at all. The plants (and algae) will use and thrive on whatever light you give them, anywhere from red to blue and any combination thereof. I'm glad there are different colors and options out there but as far as an optimum wavelength, optimum Kelvin rating or optimum energy spectrum, it's really just clever marketing.
Cheers,