Even with needing glowstone, the redstone lighting is awesome! If I ever finish my castle, my next large project is a dungeon, including many dark areas to spawn monsters. I plan to build in a lighting system so that I can light it to safely reset chests and traps, and this will make it MUCH easier.
On the subject of Nether....yeah, I've discovered that building close to spawn has the disadvantage that I can't put up a portal that doesn't connect to an existing one...usually spawn. Since I have a harbor, I'm thinking of building a platform out at sea to get a better spot.....or across the ocean if necessary. But I'll need enough glowstone that just heading out far from the portal may be the way to go.
The Tauren formerly known as Braus.
Minecraft - daosbrew