Fantastic suggestions! Thank you, everyone!
@PaperPrincess: Hmmmm, that is a very interesting idea! I hadn't thought about alternate ways of constructing the large triangles. I'll have to see what fabric I end up picking for those pieces to determine whether or not it's feasible with the print. Thank you! Unfortunately, since I'm going to have 15 entirely different center rows (each "O" a different fabric), strip piecing isn't an option.
@girliegirl: I'll PM you this evening - thanks!
@ghostrider: Aha, thank you for those links! I love Quilter's Cache. I love how versatile all the blocks are depending on color placement...
@QuiltnNan: Snowballing... another good idea to consider for those triangles, depending on how much or how little I feel like working with bias at the time. Thank you!
@Rose Marie: I love that method of constructing HST's quickly, but unfortunately it won't work in this instance (without waste/excess pieces) because I only need 4 HST's of each fabric. I wonder if there's a quick method of making just four at a time...?
@charsuewilson: Chain piecing, ABSOLUTELY! I love it like mad and it saves me so much headache and thread. <3