I hesitate to say anything, but I'm not impressed by the pictures of Delawares on Bill Braden's website. Hopefully, for the price he's charging, those are not his best examples. I'm just learning about the breed, but I think Janet's big George looked much better than those pictured. For an outcross to a different line, yes, that would probably be an okay route to go.
Beth, I'm not whose lines Kira, Cassidy and Jake came from. All I know is that my current birds are not related to the others. She could have some Bill Braden in there, but I'd have to ask her. She later added in Sandhill lines to change things up and bring in new blood, but Kathyinmo's first batch of Del males out of Ike showed way too much Columbian and Janet said looks like that bunch got all of Sandhill's worst. The second batch she has shows much more what I'm used to seeing out of Isaac and my girls.
I've seen some of Ideal's Delawares. Some are very Columbian type, some better, just the luck of the draw, I guess. If you get a great breed example from them, then that's a great thing and you could run with it. McSpin had some pretty okay ones from a hatchery, forgot which one.
See what hard task you all have taken on?