Since your Sony is on the way let me share with you a great case I found for it , the M edge Leisure case:
http://www.amazon.com/Leisure-Case-S...634518&sr=8-10
Unlike the photo (which shows the PRS 500) the Leisure case is perfectly proportioned for the device. One of the few annoying things about the 505 is the chrome edge on the top & bottom, which can create a glare in bright light, like a shiny car bumper in 5 o'clock traffic.
This case covers up the chrome but otherwise gives access to all controls (except the on/off button). It is a felt-like recession into which the 505 fits perfectly. The front cover is clear plastic and you press the control buttons through the plastic cover. It is dust free and makes your Sony water resistant. You can grab the device with your thumbs over the screen if you wish, since the screen is protected by the plastic.
(BTW, that's something that is often commented on about Kindle: you don't have a lot of 'free' areas to pick up the device. Same thing is true of the 505.)
It's much better than any case I've found for my menagerie of devices.
No other case is as practical and well suited to its device as the Leisure case.
You can buy it directly from M edge:
http://www.buymedge.com/p_Sony505Ls.html
but I found it cheaper to buy it from Amazon.