I am nuts to use these speakers?

Interesting thread....
I was pretty happy with some nice two-way monitors developed by two friends of mine in the early 90s (one now head designer at Boston Acoustics, the other runs Acentec, the acoustical engineering offshoot of the original BB&N); I helped with final crossover voicing; many were surprised at the speaker's dynamics and great bass. Over the years upper midrange/low treble roughness (tweeter resonance issues, I think) eventually resulted in me simply listening to music less and less.
After building my first 3 way, and thus realizing the difficulty in acquiring smooth, coherent bass/mid transitions, I decided to not screw around anymore, and perhaps embark on a search of established builders' fine-tuned successful results. Speaker design is HARD!
I waded through various Aeriels, Thiels, Nautilus (don't work in nearfield at all!), Paradigm, and Sonus Faber. I especially started to appreciate better quality midrange response.
I too discovered the Revel F30, and realized I now HAD to have midrange purity, and hopefully still get coherent full-range response in a 3-way for large-scale orchestral work in the nearfield. Unfortunately my wife couldn't handle the Revel's Califirnia moderne (cartoony?) looks.
I then discovered Verity Audio speakers, and fell in love!
Unfortunately the affordable Fidelios' rear-firing woofers didn't work in the nearfield, but I eventually found a demo pair of front-firing Parsifal Encores at a great price.
I listen to music at least 5 times as much this year as last, and have purchased probably an additional 50 CDs as well.
Owning these speakers has changed my relationship with recorded music. Transducer smoothness, proper room-loading,
coherence, and complete clone-like L-R freq resp matching have meant all the difference.
I certainly agree that if you enjoy the musicality of your system then you may not wish to spend the necessary time performing repeated home auditions. It's real work! Yet you may find yourself either stumbling upon, or evolving toward,
a level of musical satisfaction that in many ways equals (or in soundstaging transcends!) many live music venues!
Just one man's grateful story. Good luck with whichever path you choose! Ern

Ntscdan, you have the basis for an outstanding audio playback system. If you did not, I would not have been so quick to recommend you change your speakers. If you think your system sounds great w/ the JBL 4311 (which are not a bad speaker, but they are a 25 year old design), then you will be thoroughly amazed by what can be acheived with an up to date speaker design. There has been significant progress in speaker materials since the 4311 first left the JBL factory. Witness the carbon fiber construction of the JBL LSR series with their molded tweeter wave guide. My suggestion is to hook up with a good dealer who will let you do at home auditions. Try a number of different brands and models and compare them to your 4311s. Some may not sound better, but I would truly be surprised if you quickly didn't hit upon some model that makes the 4311 sound relatively unlistenable. The 4311 are holding your system back.

Yeah, you'd probably be opening up a can of worms, but your speakers are so far below the capabilities of your other equiment that at least not trying something else doesn't make much sense to me. It's probably going to take some time and effort. Up to you whether it's worth the effort or whether you have the time. If it were me, I'd start looking in a heartbeat. Good luck.

How ya gonna keep em down on the farm after they've seen Paree? The door is cracked open and there is no turning back now. Good luck with your search Ntscdan.

I am going to get a pair of the JBL LSR32's and give them a try. I'll let you know how it works out. I will be glad to see the last of the spring loaded clips on the back of the 4311's. Kind of want to keep the system all Made in the USA!