Are you prepared to deal with boys? I have to be honest out of ALL the chicks I've had (more than 100 probably) Marans are the biggest jerks. Very rowdy bunch. They mellow with maturity though.
It is my understanding that fathers will pass their egg color gene to daughters. Is this 2.5 hours one way? That's not too bad! I have easily driven 3 hours each way (in my gas guzzling Suburban) for good chicks (on MORE than 1 occasion), and it has usually been well worth it. I know many others who have driven much farther!
FFA is a whole other story for me... oh wait, I was thinking 4H. FFA might be a fun try! I agree most hatchery Marans egg color is NOT worthwhile.
Make a day of it and stop for lunch at someplace new before picking the chicks up.
So far my hatchery Welsumer is easily laying a 4 on the chart. Hope it stays nice. They seem to be fairly independent birds, not to worried about my company. My Marans eggs are around 5 most the time, but I worked so much harder to get there. The Marans girls seem to like to hang out quite a bit, so more personable in general. AS much as I thought I really wasn't crazy about their feather pattern/color and only chose FBCM for their meat quality, hardiness, and egg color... I have to say they are beautiful (purple/green sheen) and even though I'm reaching for the SOP they are still varied enough in their necks and such that they are easy to tell apart still.

Lovely birds! Plenty broody as well,
Good luck getting great stock.