Hey Jeremy, yah neighbors can be entertaining...
The dome I use is a varifocal 4MP Dahua IPC-HDBW4431R-ZS, which I got from Amazon for about $95. In general there are a lot of complaints about domes outdoors due to sun reflections, IR reflections, spiderwebs, and various other problems. I've had very good luck with this though. The foam ring inside the dome on this camera shields the lens from the IR LEDs very well, so there isn't any internal IR reflection. My front porch is well covered, I'm fortunate to not have a lot of spiders so I've never had a web, and since it's right by my front door I just wipe off any dust that gathers on the dome when I see it. A front door cam can be an exception to the "no domes outdoors" rule, IMO.
I think the Dahua mini dome (IPC-HDB4231C-AS) that nayr reviewed would be a very good choice also, being a Starlight, but it costs a bit more.
Dahua Starlight Mini-Dome 3.6mm (IPC-HDB4231C-AS)
Edit: Oops, correction. The IPC-HDB4231C-AS doesn't have IR, so it might not be as good of a choice as perhaps the Mini IR Wedge IPC-HDBW4231F-AS if you're looking for something smaller than a standard sized dome.