IT depends on what you have space/time for.
If you have time and a spot to keep a prop dome under constant light and nice and cozy, by all means pinch the tops, wait another 1-2 weeks for that side growth to get stronger, cut clones, LABEL THEM, wait another 2 weeks for the plants to get over the shock, and flower away.
Don't cheat yourself by taking small wimpy clones. They should have a growing tip, 2 fan leaves cut down to 1" blades, and a stripped node further down the stem. That's pretty much a minimum for healthy clones.
Your plants do not appear sexually mature yet, so flowering now isn't going to get you too far- it will take longer for sex to show, and you can be adding undue stress.
Doing the clones in a week or 2, you are givine the plants time to mature, and giving yourself the option of skipping the whole seedling-rearing/sexing step on your next grow.