My opinion is that Colby and Bo Pursel would be a good match, with Colby having a pretty good size advantage. I don't know the Newton kid, but if he is for real, him, Bo, and Colby are the top 3. Is the reason you have Seybold ahead of Bo, that he is bigger? Haven't seen Seybold for a while to know.
Have you seen enough of Seybold now to give him any credit?
"Stats are for losers. Final scores are for winners." Bill Belicheck