as long as you have got the latest firmware (usually do, like 3+ days after getting the modem), bridge mode is likely the best..
as you can use 100% of the features in the time capsule.. which may be more than the hitron itself.
You CAN do other setups, where say the hitron still runs as the modem/router part.. but not wireless.. and you use a router like the time capsule as a wireless access point only. GENERALLY, this is only used in other cases like myself. My modem is located in the FRONT of the hosue, basement. Even with a better router there.. not the best local for the wireless for best coverage. No easy way to re-locate the MODEM itself.. but there is ethernet running to the living room in the middle of the house. In this case, ethernet to the router in a more central spot, acting just as a wireless access point to serve the wireless.