Evh 5150 iii 50 watt combo speaker upgrade

[sanadkhalid2]

I've been looking to replace a speaker of my evh 5150 iii 50 watt combo so my clean tones won't start to break early, so which speaker do you guys think would be the best for warm cleans? And i also read that if you don't want your clean tones to break early look for higher wattage speaker.
Thanks for the help and time