Well, it is pricey, but I use a Netgear n900 (wndr4500). This is a simultaneous dual band (2.4Ghz/5Ghz), 802.11/a/b/g/n wifi router with independently configurable radios for the 2.4Ghz and 5Ghz.
In my home it is used to simultaneously connect a MBP, an 5yr old Windows Vista Acer (with an old DLink g wifi card added to it), a PS3, my Sony LCD TV, a Kodak wifi printer, and older Dell wifi printer, my old iPhone 3Gs, my current iPhone 4 and iPad, a Nook color, a Nook simple touch ereader and an AT&T 3G microcell via ethernet cable connection (has nice QoS settings to make the microcell's ethernet port top priority). Also occasionally my old PowerBook G4.
it works flawlessly. As far as "phone" support, do you mean VOIP? That is highly dependent on your ISP's level of service usually, more so than the router being used. I know my microcell works fine on my n900, but I have cable internet and get a nice clean upload rate of close to 1Mbps (upload rate and quality is often the big limitation for good VOIP calling).
There are cheaper options, but in terms of performance the n900 seems very impressive to me (and it has fairly good web setup/configuration tools - not the simplest as it has many configuration options, but well laid out and easy to use if you are at least somewhat familiar with wifi setups).
For what it is worth, I've used Linksys, Netgear and Belkin in the past with a highly mixed wifi suite of devices (Apple, Windows and others) for years and never had a problem getting my network to run flawlessly. The last Airport I personally owned was the original gray space saucer model.
