As a Super Alnico monitor owner for about six weeks now, I think I can offer a little help here.
In a medium/small room (around 9' x 14' of usable space) the Super Alnico has no trouble at all with large-scale, orchestral music. I am using a single-ended 300 B amp putting out around 8 W per channel. I was listening to an excerpt from Pictures at an Exhibition (the final two sections) on a Reference Recordings orchestral sampler CD. This music is full of blaring brass choruses and huge timpani whacks. It was plenty satisfying for me.
I would certainly go for the Super Alnico if you can afford it. I will say that in my experience, these speakers need and deserve a good, solid stand. Skylan is certainly a worthwhile option, but there are others. Without a quality stand, you simply won't hear everything that these speakers are capable of delivering.
I'm currently in the process of upgrading some of the tubes on my amplifier and at that point I think I'll feel comfortable offering some detailed observations about this speaker. Even at this point, though, I would confidently assert that these speakers do things with ambient and spatial information, along with imaging and sound staging, that I have never heard any other speaker do in my listening room (and I've owned quite a few different speakers in my day)! They are stunning in this regard.
