That is precisely what the two units you listed do. What specific feature is it you need?

Just something to quiet the monitors and turn the headphones on because I can't record with the monitors on for obvious reasons, I was looking for something a little less pricey, there's features on those I would never use unless I was in a bigger studio.

Are your headphones AND you monitors both plugged into the Fast Track Pro? If so you can use something like the TC Electronics Level Pilot which is what I use with my powered monitors on location.

Yes that looks like exactly what I need, Im going to try it out. Thanks a lot!!

Furman HA-6AB headphone amp has 6-channels of headphone output and the ability to run studio monitors. Press a button and it diverts the signal to the monitors rather than the phones.

I use a small mixer - the Soundcraft Compact 4 to be exact. It has 2 stereo speker outs and 2 headphone outs.