Solaris 10 is a rather amazing OS. I learn quickly, but I was hard pressed to even tap the surface of Solaris. It is very fast, has new features that are revolutionary and old features that are not very well known, but deserve to be. Its hardware support could, and I think will, be improved, some software will be difficult to compile and it can be difficult to use at times when coming from other NIX. However, any relatively knowledgeable user should give it a shot. You may be impressed.