Hmm, I know what you mean. The MD-80 always looks so good because it is so narrow with its wings far back. The MD-80 really looks good in mostly white schemes like AS and the old QQ one. The MD90 was the apitomy of this, but there are very few of them around [sadly].
The CRJ900 isn't quite long enough, but its not bad. We need a long 717 or something, but I don't think that is too viable.