[TriLUG] best home router for voip prioritization

[Dewey Hylton]

hi all. its time to replace a router at my mother's house; it's been there probably 7 years or so, and isn't able to prioritize traffic. i moved her to an asterisk-based voip solution (raspbx works great!) a while back and when her internet connection is in use otherwise, the phone calls become somewhat garbled.

i'm using the same voip solution at my house, and don't have the same issue; but i'm running an openbsd firewall and am able to prioritize the traffic, so i have to assume that's where the difference is. of course my home office has complete infrastructure services, such as separate dns/dhcp/wifi access points,  where my mother has the one router which tries to do everything. 

my initial thought was to just build her a little openbsd firewall on the alix platform (these see a lot of use at my customer sites) and redeploy her wifi router as a plain access point, but that will also require a switch and will be much more expensive than just choosing a home router which might already provide what i'm looking for. another option would be to deploy pfsense (maybe alix w/wifi) but the cost is still up there. i am a bsd guy through and through, and am absolutely uninterested in maintaining a linux-based firewall unless it's dead simple. some of the linux-based router os replacements are nice, and i've used them before; but i'm an enterprise networking type so haven't touched that kind of stuff in a very long time and figured you guys would have a lot more experience there.

ethernet requirements:
 1 desktop computer
 1 desktop printer
 1 rpi
 1 ip phone base station
 1 uplink to the cable modem

wifi requirements:
 1 laptop
 1 smartphone
 1 tablet
 N laptops/smartphones/tablets for family members which float in and out

the ethernet ports are currently provided by the current wifi router. the desktop (and possibly the printer) are also wifi capable so it may be possible to use less wired connections.

so there are the needs ... what are your recommendations?