Thank you for the suggestion.
We purchased that Cradlepoint router and hooked everything up. It seems to be working better than when we used the Linksys as a bridge repeater (more stable - less disconnects w/ Cradlepoint), but the range seems even worse - which is surprising considering the Linksys was a G device compared to this Cradlepoint N. Also, there are still some random disconnects every now and then, where we lose our internet connection.
To resolve the signal issue, we purchased the external WiFi antennas today and will try to see if that helps with the signal any once we get them later this week.
Do you know what could be causing the random loss of internet? I imagine the MiFi is to blame; perhaps we need to find a better location for it in the house?