Ohm Walsh 4s worth looking into ???

They offer many upgrades to the older designs, 4000 series and 5000 series, anybody upgrade their model 4s to the newer drivers ??? 
I upgraded from the Walsh 5 first to the Walsh 5 Series 3 and presently the Walsh 5000. The improvements over the original are substantial: a much more detailed and transparent mid range, tighter and more tuneful bass, and a seamless coherent sound providing for a wide and deep layered sound stage. Dynamics and power are effortless. Extended listening with no fatigue is guaranteed. I would recommend that you do an extended audition of the 4's, optimizing the room and setup. If you like what you hear, the upgrade will then be a slam dump winner. So I do recommend the upgrade. And the people at Ohm always stand behind their product and offer a 120 day try before your buy policy. You have nothing to lose.
I still use and enjoy my original Ohm Sound Cylinders! Pretty amazing!
When in doubt, contact the manufacturer. Ohm has good customer service. They contacted me quickly and gave solid advice.
I know them well big presentation but not true Audiophile 
i know build quality well very average At Best parts quality .if you get it cheap enough and rebuild the Xover with high quality
components then yes it has respectable potential. The Xover is the heart of every speaker. All too often. The Majority bought cheaper 
parts inside for mostdonot know capacitors and quality well and 
it is all about saving $$. I sold audio for years ,did you know less then 25% of thecost if electronics ,and speakers actually goes into the parts thatis a fact.