You won't have much choice regarding switching because, under EU rules, the older tungsten bulbs are being phased out. (Many tungsten bulbs are already banned from sale).
The problem of the newer bulbs being too dim has frequently referred to here on AB. The problem comes about because the light from the energy-saving bulbs is at a different frequency to that from the tungsten bulbs. So, while a new 11W bulb does (as the box states) give out as much light as a 60W tungsten bulb, the human eye doesn't see it that way (because it's less responsive to the frequencies from the energy-saving bulb).
The solution is simple. Just buy a slightly more powerful bulb. For example, if you're replacing a 60W tungsten bulb, don't buy an 11W energy-saver. Instead, buy a 15W energy-saver (which is nominally equivalent to a 75W tungsten bulb). You'll get the light output that you require but you'll still use only a quarter as much electricity as you would with a tungsten bulb.
Chris