Although it's not a hard-and-fast rule, (it should be obvious by now if you're actually reading this thread, that there are no rules when it comes to the subject of loudspeaker power ratings) if you want more sound level without causing damage to the speaker itself, you should have adequate power and choose speakers with higher efficiency ratings.
Broadly speaking a high efficiency speaker plays louder than a low efficiency speaker (note here I'm not referring to Sound Pressure Levels (SPL's) at x watts amplifier power, but rather the ultimate SPL), and much of the difference has to do with the higher efficiency speaker's ability to apply more power to sound pressure rather than heat.
It's also generally true that the most efficient speakers are horn loaded, perhaps you might want to listen to various Klipsch models and see if you like the sound, which will lean towards a "live music" rather than a "studio sound" characteristic.
http://www.klipsch.com
With virtually all horn loaded speakers, there is a characteristic of leading phase from Highs to Lows ... in other words, in time, the tweeter horn leads the mid horn which leads the woofer, which is often conventional (non-horn loaded).
*Phase is a measure that includes time as a variable.
This is also reasonably common in conventional speakers, but typically not quite as pronounced, and there are speakers that try very hard to time align the presentation (Vandersteens are one popular example, and full-range electrostatics or planar magnetics also tend to be time aligned).
http://vandersteen.com
A leading High Frequency (HF) to Low Frequency (LF) phase response tends to produce a clear, crisp and bright sound quality that many listeners enjoy, and many manufacturers don't consider to be a significant negative quality, even though it is a deviation from strict accuracy.
There is typically a rather strong preference amongst listeners; which is to say that people either love horns or hate them. Personally I don't own them and probably never will, but on the other hand I can enjoy the presentation; I don't "hate" them, I just don't prefer them.
However, if you live in a city where you have an opportunity to hear both of the above model lines, you should have a listen to them, you might learn something about your preferences and tolerances.
Finally, if you find you like the sound of one or another horn-loaded speaker, you may well also find you've solved the problem outlined in your Original Post (OP).