Those are where you need to be, after you figure out you're cooling problem you can think about faster clocks
First step of troubleshooting: remove all unknown variables. Remove your OC's, benchmark your temps at stock speeds. 99% of the time, OC's are user-error and running less than optimal settings, including vCore, etc.
I wouldn't own anything watercooling with 'Zalman' written on it...just my opinion. That pump looks mediocre...kind of like it could be a lower-end Jingway?