I would check out the rheostat on your dimmer. Sounds like the sucker is either turned all the way down, or it is worn out and mimicking the lowest setting. All the brighter bulbs in the world won't help if the dimmer is turned all the way down.
As for easier to use, I am not really sure what is difficult about your instrument cluster. It's layout and form isn't much different from what you find in a lot of newer cars. Seems to me like you would spend large amounts of time, effort, and money to gain something insignificantly different from what you have now.
The other option would be to build a custom panel, plate over the existing panel opening and install stand-alone gauge work. Then you could arrange it however you want, and put in whatever gauges you want. Want a tach, you can have a tach. Want a volt meter, you can have a volt meter. Don't feel like a speedometer or engine temp gauge are important, leave them out.