I went to the Houston Livestock Show and Rodeo 2009 Paint Horse show yesterday, and I actually had the chance to talk to one of the judges about the little colt. He said he wouldn't buy the solid colt for $1000, even though his lines look decent (though he said he didn't care for Conclusive too much.) He said if he was going to spend $1000, he'd definitely look for color (rather - colored papers - even though color doesn't matter in standard halter classes, it opens up a few doors to have regular papers), especially in today's market.
THAT being said, I LOVE HOT SCOTCH and his get. Half the horses that won the halter and showmanship at halter classes were Scotch babies (or Awesome babies.) I like this little filly's head MUCH better, and I think she's just precious. Scotch babies tend to muscle out well and stay really balanced. I even saw a Scotch yearling take reserve champ against 4 and 5 year olds yesterday. I say go with the filly. :]
Hope this helps.