My view is that if you need reasons to justify purchasing a new body, you don't really need the body (yet). To spend wisely, you'd have a problem first, then search for solution, not the other way around. Perhaps a new lens, a flash or an exotic trip would give more boost to your photos than a body that just seems "better" in no important way.

My view is that if you need reasons to justify purchasing a new body, you don't really need the body (yet). To spend wisely, you'd have a problem first, then search for solution, not the other way around. 

Perhaps a new lens, a flash, a sturdy tripod or an exotic trip would make more difference to your photos than a body that just seems "better" in no important way. A lens would also last more years than the body.