Its hard to say. I haven't had any experience with radions. What are your goals if you got the tank? If you just want softies and lps I would say yes. If you want a more sps dominate tank I would think 3 xr15's would be perfect. Another good option would be to supplement the two xr15's with led strips like reefbreeders, reefbrite, or orphek
It is a bit tall to reach into. I am 5' 10" I think, and I can reach into the tank and touch the bottom but my arm pit is pretty close to hitting the top of the glass (Nothing a little stepping stool cant fix though). But the build quality is great and service/shipping was good from waterbox. Only thing I would change if I were to buy it again would be to get a larger size! (And after-market sump)