The trouble is is that the "normal" drive orientation is usually better for air flow. If they do sidesaddle properly and add a fan on the end of the drive cage, then that's just one more fan's noise to add to the rest. Some take care to really open up the sidesaddle cage for reasonable air flow with a front mounted fan. But if sidesaddle is your thing, then you can't go anywhere in the Newegg case list w/o tripping over them. Check my Rosewill thread for some of the better inexpensive ones. The R6A series in the same thread is good too and the whole HDD cage comes out with one or two thumbscrews.
.bh.