[KozmoNau7]

I used a pair of Adam A5Xs as my main speakers for a long time, and those were perfectly capable of filling my living room with sound, as well as being seriously good and accurate monitors. Obviously the 5" woofers did struggle a bit with bass at high volumes, but so would any hifi speaker with similar-sized drivers. Augmenting them with two 12" active subs took care of that well enough. Replacing them with the larger A7Xs or A8Xs would have been an option as well.

I've since replaced the Adams with a set of Monitor Audio Bronze 2s, because I wanted something with a bit more living room friendly looks. Finding an AVR with outputs for active speakers is surprisingly difficult, so I had to go back to passive speakers, and I compensated a bit by getting the largest practical model I could fit.

Studio monitors are as varied as any other speaker design. There are ones with really small sweet spots and others with extremely huge ones, the JBL LSR series is a great example of the latter, their horn loaded tweeters have really impressive horizontal dispersion.