Amp for Green Mountain Europa

... Building a new system around the Europa's; also Discovery Essence IC's, Sony TA E86B preamp( to be replaced in time), Tyler Reference subwoofer.

Someone I trust strongly suggests 125-150 watt Edge or Blue Circle for amp. Soundstage, imaging, detail, power reserve are important, plus other common attributes of a higher quality power source.

~$2000 budget, new or used. What other amps should be on my short list to take advantage of the full potential of the speaker? I would also appreciate comments from those with experience with the Europa's and the two amp families mentioned.

I live where there is little or no access to audition finer gear so my decision will be made based on literature and on info gained from this sort of feedback. Thanks.