TBII or III here. III will give you a little more open time. The problem with 2part epoxy is that you have to keep remixing, and on a large bench, the clean up can be messy. With TB, the clean up is soap and water. TB is plenty strong here.
On light woods, TB2 can sometimes dry to an orange/yellow that will telegraph through the seam. TB3 dries dark brown and less noticeable, IMHO.
The biggest bang for the buck for a seamless look is to joint very well, and clamp your boards one at a time with cauls, so you can get perfect pressure throughout the entire length.