Consumers love to count the drivers on the speaker to determine their worth. The furniture rental two years ago had a pair of 5 way speakers demonstrating out on the sidewalk on FM radio. The sound was awful, considering they were using the pop station that doesn't even transmit unmodified human voice anymore. Not all 4 way systems will be awful, just most. Take some demonstrator CD's and take a listen, you might find good sound at a bargain.
JBL has a consumer division, and a professional division. The consumer division specifies frequency response with +- 10 db tolerance. The pro division doesn't say, but +- 3 db is more usual. Peavey actually specifies +- 3 db on their datasheets. Then there is Radio Shack. I bought a set of headphones from them once, they were +- 3 db 20-20000 hz. Then in fine print at the bottom, the production tolerance was +-20 db. Usually RS doesn't mention the production tolerance, that was a mistake. I have to say Radio Shack speakers always sounded awful in the store.
I'm suggesting one listen to any proposed speaker system with 1. a great piano recording including all the keys and 2. A bass drum hit to determine time alignment. Lots of money was spent on Klipshhorns over the decades, but when I heard them demonstrating in the store they were using light jazz as a demonstrator- trumpet, sax, string bass. None of these instruments is hard to reproduce. The dirty secret was that the time alignment of Klipshhorns was terrible.
So, pick up a $2 used copy of the Afterburner CD and tell me, how great are your monitors + subwoofer for time alignment? MP3 versions of the track don't count IMHO, they don't have the dynamic range of a CD or even that of an LP. "Booig" is not a bass drum hit. And listen to the difference between a great piano recording on headphones, versus the sound in your room. The headphone is easy to do right, the driver is pumping 2 cc of air an an enclosed space. The room is much harder there of thousands of cubic feet of air to move, plus reflections and dimensional sound filters. Both should sound like an actual piano in the same space. I have a piano installed between my speakers, which provides a built in sound calibrator.
The Peavey SP2, and the JBL 215, are copies of the Bell Labs inspired Altec Lansing Voice of the Theatre two way speaker. I heard the originals in a theater in 1967 at the suggestion of my band director, and have wanted some ever since. VOT have never gone used for under $700 each, and draw that much now for used units with a non-functioning driver. So think twice before you denegrate the well-engineered two way design. Take a piano CD, and a bass drum CD, and test some speakers and see what you think of them. And remember the store dimensions, and your room dimensions are quite different. The biggest vendors of speakers now in my market are huge warehouse stores (best buy), where there are no walls, ceiling, or carpeted or stuffed surfaces to modified the sound. Just a bunch of stupid metal shelves. Bankrupt Circuit City built special five sided rooms with hard walls to demonstrate their high volume, vile sounding, car systems in.
One thing that is sorely lacking on most reproductions of piano is the ping that occurs when the hammer hits. This takes a lot of power, and most systems don't have it. People have gotten used to the electronic version of piano over the years, and I can't believe people take youtube seriously on pianostreet. I just listened to the Horowitz in Moscow youtube performance on headphones. This computer can sound rather good playing a CD into headphones. The youtube performance had all the frequencies, and didn't have vile intermodulation distortion, but the power of the piano hammer was not there. It was all homogenized.
While my PA speakers have the heatsinks to play mono-volume technorock at 300 w all day and all night, I don't use them that way. I use them at about 1.5 Vpp base level into 8 ohms, or about 1/4 watt. This leaves plenty of headroom for piano hammer or cymbal or bell percussion before clipping cuts the tops off the waveforms and causes distortions.
Besides the JBL 215, the Altec Lansing VOT, the Peavey SP2, another well respected 2 way driver plus horn design is the La Scala. On the used market, because of the continual breakup of bar bands, particularly after smoking in bars was banned, the SP2 is the cheapest around here.