I have a Hub 3.0 and I want to be able to use my Apple Time Capsule with it. Before they forced me to move to this new hub I used to use my Time Capsule as my wifi router and be able to use it to back up my computers wirelessly.
I use a Time Capsule with my SH3. My suggestion is put the SH3 in modem mode and then use the Time Capsule as your main router and for WiFi purposes (connected via ethernet to the port nearest the co-ax cable on the SH3). It tends to do a better job than the SH3 for networking and WiFi and your Mac's should have no trouble finding it for backup.