CPE selection

Hi all,

I need to order some MIkrotik devices to be used as CPE. I found a device the has a high gain antenna and another that has higher power. Which should I choose, a CPE that has a high gain antenna or one that has High power?

Ok so basically i need to replace an SXT Lite5(SXT5nDr2) that is NLA, which was giving me a signal level of 72. My choices now are the Disc Lite5(RBDisc-5nD) and the SXTsq 5 High Power(RBSXTsq5HPnD). Which of these devices will allow me to improve the signal level at the customer end, assuming all other things remain the same?