I did the Solomons on the Spirit of Solomons (sister sihp to Bilikiki) several years ago, have been to Raja Ampats, Triton Bay, Komodo, etc. since then and just got back from a few days of diving on Rainbow Reef in Fiji. Unless diving in the Solomons has changed since I was there, I'd say this about it - it wasn't the best at any one thing (critters, big animals, wrecks, etc.), but it was very good at a lot of things. Not as "pretty" as Fiji, the walls weren't what you'd find in Palau, some big fish action in certain places, but overall very good diving. What struck me most were the huge sea fans, the large schools of jacks and barracuda in places, the topside beauty, and the people (wonderful). It's one of those places that doesn't amaze you all at once, but by the end of the trip, you've checked off most of the things you wanted to see and you think back and say "that was really good".