Decisions, decisions, decisions

I initially had a short list of potential speaker upgrades for my 2-channel set-up and I find myself in a bit of a quandry. I've narrowed the list down to 2 speakers and neither are remotely like one another. I currently have some mid-level Polks and they're "ok" in that they get the job done for low-level listening enjoyment but I really want to step it up a bit. I can justify $4K for my budge which puts me in a bit of a sweet spot for my preference for stand-mount speakers vs floor-stand speakers. However, my short list consists of either the new Sonus Faber Sonetto II G2 stand-mount or the Vandersteen 2ce Signature III. Because the SF Sonnetto II G2s are brand new, a used option is out of the question. The Vandy 2ce III's come up used occasionally but where I live, previewing either one is not a viable option because there aren't any nearby dealers. That being said, I can get both of these from Audio Advice. If I went with SF Sonnetto, I would probably supplement those with a subwoofer down the road after sometime. At that point, I'm nearing the price range of the Vandersteen's. The question I have for the forum is does anyone have experience with the SF Sonnetto II pre-G2 and what are your thoughts about them?

I have a Marantz integrated at 50W and my only concern w/ the Vandersteen's is not having enough power to get great sound out of them without adding an amp (while I have a vintage Adcom GFA-2 at 100W/ch) that I could use, I"m not against getting an amp for either the SF's or the Vandy's.

I listen to a wide array of music genres but lean towards rock, jazz, electronic/industrial, dub, funk, and classical with some pop and old-school country thrown in on occasion. 

I've the impression that those with the Vandersteen 2ce's are very pleased with the SQ. But does anyone have experience with both speakers?