The side fan is fine. Isn't the scropio pretty much the same as the raidmaxx but $21 more expensive?
Also found that case for $10 cheaper here:
Scorpio Case
Side rails are defintely a nice thing to have. Removable motherboard tray would also be a nice touch. But if you can live without conviences as they only matter every once in a while, get the cheaper deal.
If anyone is a hardcore asus fan and wants a unique case, check it:
Asus Case