I like, and install boxes from Arlington.

http://www.aifittings.com

Their weatherproof boxes

http://www.aifittings.com/catalog/inbox/

Here is just one example. Note how the outlet is back in the box and that little of the box protrudes from the wall.

I use the sliding ones from aifittings also.

Sliding Cover

PPF, I can't find the one you pictured. Which model is that?

nevermind, I found it. Siding is already up so need to use the sliding one I think.

Which model is that?

Don't know. That is a generic picture found via a google search.

I use this model most of the time. Available in vertical and horizontal versions.

These are paintable too.

http://www.aifittings.com/catalog/inbox/low-profile-in-box-for-flat-surface-retrofit-construction/

I ordered one of those but it looked to deep for 2x4 framed wall. Have you used it with 2x4 framing?

Have you used it with 2x4 framing?

Plenty of times, but it will depend on how your wall is built. This shows the dimensions.

http://www.aimedia.co/media/line-drawings/DBHR1.pdf

In use receptacle covers are required by code now. You can however get ones (they sell them at the home centers) that have a bellows like arrangement that allow them to sit flusher to the house when not in use.