Hi,
I have heard both speakers for a long time and finally decided The Rosa. I have the Rosa for more than 3 years and still love the sound of it. In my point the tweeter on the Eggleston Rosa is the best out there right now on the market, Dyn audio stop selling them due to the prices so high. The second generation of this Esotar not close to the first one. I have owned Wilson and Voce Divina both use the same tweeter of JM labs speakers and by far the Esotar I is best: airy,strong and very close to real sound.Meantime I am using Jeff Rowland Model 12 with the Rosa and the sound is very musical...I not gonna compare these sound to tubes amp as many people out there likely so. I just want to compare to real music instruments. You might look for amp that rated class A so it can handle the Rosa well. I have seen lately many Threshold SA models amp. on Audiogon for the money and quality, I think it the best. Good luck and enjoy music.