I use an Asus RT-N56U in router mode and the newer RT-N65U in AP mode. Streaming between my TiVos has been rock solid with them.
Roamio Pro (5TB Red)
TiVo Mini x4
Roamio Basic(1TB Red)/Roamio Basic refurb(stock drive)
53TB unRAID2--38TB unRAID3--33TB unRAID1a