I have a chance to pick up a slightly used Eminence Texas Heat 12" 8 ohm speaker CHEAP! It's a 150 watt speak. I want to use it in a 1x12" cab as an extension speaker for a Mesa 5:25 Express. Is this too much speaker for a 25-30 watt amp? Should I get something w/ lower wattage?

Please advise poor pappy, oh wise amplifer guru's of MPLF!!!
Thanks in advance