Focal Utopia monitors: Diablo vs. Micro Be


I have a pair of Micro Utopia Be speakers (complemented with a REL Stentor 3 subwoofer) which I drive with an Accuphase combo, i.e. the E-550 amp together with the DP-500 cd player. I like the speakers very much and I was not really thinking of getting rid of them, nor am I feeling the need for a change/upgrade. However, an audiophile friend of mine informed me today than one of his friends is selling a pair of Focal Diablo Utopia 3 speakers for about half the retail price. Since the speakers are less than a year old this seems to be a good bargain.

I am interested to here opinions from anybody who has compare these two speakers. Are the differences so significant to justify a 5K (euros) investment?

Thanks!
nvp
Elviukai, will you tell me where you found the Diablo's phase shift and impedance curve. I've been looking without success.
I measured it by myself. I didn't noticed electrical phase measurements but I have a frequency and impedanse measuremets in audiomagazines as well.
Thanks Elviukai, I'm using a robust 25W/Ch. tube integrated with the first generation Mini Utopias. I'm generally happy with the combo but the Mini's have some severe spikes below 100 Hertz. Based on your measurements, do you have an opinion on a change to the Diablos.

I looked at mini utopia impedanse indeed both peaks are more peaky (30 and 35 ohms at 30 and 80hz respectively) than Diablo which have 31ohms and 17 ohmz at 36hz and 78hz respectively. however it would not be major dificulty to amp. I have not heard oldest model of mini utopia, but I believe its still top of the class performer and probbaly way much honest comparing to diablo(it look like more studio monitor to me seing frequency response) but Diablo is so seductive and it feels so good to enjoy it. its the first focal speaker which is enjoyable to me for its character rather than ultra audiophile quality.
Thank you Elviukai. That's extremely helpful. I spent a good year auditioning speakers before choosing the Mini's and I still like them. But when pretty much everything I read proclaims that these third generation Utopias easily blow away the Be's, my interest is peaked. That said, I agree with those that consider it critically important to get the synergy between a speaker and amp right.