Those rims and either hubs should make for a nice set of wheels if built by a good builder. A nice upgrade from your current wheels. You'll definitely notice the lighter weight and an improvement in climbing feel, probably greater lateral stiffness. You might notice a smoother ride if you take advantage of being able to run lower tire pressure with the wider rims. Good wheels are a great upgrade, especially if your goals are tactile rather than looking for dramatic measurable performance gains.