What are your thoughts on this (guilty pleasure) combination?

I love it, and I honestly think it's usable. Both names are extremely cly, handsome, and intelligent-sounding, and they complement each other very well. Xavier is perfectly usable in daily life...he won't be one of 3 in his cl, but it's a name most people have heard of, know how to spell, etc. The middle name will won't really be used everyday. I'd rate Xavier Leonardo a 10/10.