theseeker, i'm with headala on this, if you shorten the sata power cables you're getting rid of the loops and it will look very clean. If you ever plan to rearrange the harddisk setup you might have a problem though. Actually, having some length on the cables is not bad as long is it's all organized. In that pic it doesn't loook bad at all and above all, it will be out of sight.

Oh and yes, the horizontal mount looks good indeed.