Reasoning: the SLX's are a climbing clincher. Meaning they gave up a lot of strength in rim depth and spoke count to get a lighter wheel. That makes them less dependable, especially for someone at your weight. I have teammates who have broken spokes on their SLX's and they weight 145 soaking wet. And they use ceramic bearings (if you're looking at the 2009 model and later) which are failure prone.

You want durability and dependability. You get that, and some very nice performance, from your EA70's already. Be happy. You picked a terrific wheel for your needs.