I would prefer a version w/ SPF. The SPF can be quite drying to the skin, especially if your skin needs moisture. Those with dry skin probably want to stay away from layer product over product that has sunscreen in it. It will make thirsty skin even drier. In addition, if you want to get the full benefit of an SPF, you'll need to reapply the product at least every two hours, if not more often. After that, it is useless. We've all seen it: despite using a high SPF on vacation, we got a tan (or sunburn).
If you want protection from the sun, a waterproof sunscreen would be the most effective (though those do not mix well with make up). The best advice is to stay out of the sun and stay in doors. While that is not always possible, the best possible use of sunscreen in make up is to apply it about 30 min before you leave the house. Protect your face (or any exposed body parts) with scarves or hats. Use physical screens such as umbrellas or specific clothing. Now it all depends where you live and what kind of sun exposure you get on a daily basis.
To put in a nutshell, the SPF in most make up products is just a marketing gimmick that jumps on the train of selling a "healthy product." Unfortunately, by no means it is an effective way to protect your skin as the SPF will not last throughout the day.
HTH