Golden Ears speakers must be top for sure, but out of my budget. I take note of the Paradigm 11 too. Yes, had the chance to talk to Ramones' first album producer and told me they listened to a JBL L100 paired with McIntosch valve amp., but again, out of my budget (at least in my country - Argentina). Thiel and PSB are not available down here.
From your inputs I have now a clear understanding that I will need to update the amp sooner than expected.
Assuming that I get the proper amp. for the speakers I finally choose, what do you conclude after reading the following reviews from Stereophile (Studio 20, MA s6 and X12) and What HiFi (BW 685) - taking into account my only objetive of listening to rock music?
Reviews:
X12 vs Studio 20 vs MA s6:
The Dynaudio Excite X12 had a warmer midbass than either the Paradigm or the Epos, but also a detailed and ambient midrange. The Excite X12's highs, however, were silkier and more laid-back than the Studio 20's—but the Paradigm had superior dynamics at both ends of the audioband.
The Monitor Audio RS6 Silver had a detailed midrange and extended high frequencies, but its highs, especially sibilants, were more prominent than the Paradigm's. However, the RS6's mid- and lower bass were the best of the group in terms of clarity, extension, and dynamic slam.
-BW 685 s2: The soundstage is wide and deep, enveloping you in a richly detailed, subtly dynamic and cohesive performance, whether you’re playing Aerosmith, Lorde or a Hans Zimmer soundtrack.
The deep and taut bass is particularly impressive. Play Led Zeppelin’s Whole Lotta Love and the bass notes are so rich and powerful that it almost feels like there’s a subwoofer in the room.
While the 685 S2s don’t make too much of a fuss with hard or bright recordings, give them a pristinely recorded album and they truly shine.
Switch to Radiohead, and the stop and start of notes are definite, rhythm changes are handled with confidence, and each instrument is conveyed with a great deal of finesse and insight.
They can also go extremely loud with little obvious distortion – we rarely have this much fun listening to music so loudly in our listening rooms.

