Shimano vs. Sram on my cervelo p2c?

so currently i run a very crazy mixed groupo. i am planning on having a groupo all the same. right now i have what i believe to be forte front and rear derailures, dura-ace chain, sram rival compact crankset (with 2 bent back into place teeth), lower grade sram cette and dura-ace shifters on my p2c. i want to ask what would be a better choice, go ultegra derailures, cranks and cette and keep the dura-ace chain and shifters? Or suck it up and pay a little more money for sram force derailures, cranks and cette? will having the sram components with shimano chain and shifters be bad?