>> So, if I try installing SOHO, will I get a chance to chose Xfce instead of KDE in a standard install -- or does this require a bit of work on my part? >>
You could uncheck KDE when you are choosing what to install, but I wouldn't recommend it. I tried not installing KDE with one of the Release Candidates, intending to add XFce with slapt-get, and I wound up with a mess because the system wanted certain things that came with KDE just to work properly. (XFce was not included in the ISO at that time but could be installed later.) It may be that with SOHO Deluxe this has changed and installing just XFce with no KDE would work fine. However, I wouldn't take the chance. Although I don't like the KDE desktop environment, I do like some of the KDE programs like K3B, Konqueror, and Amarok, so I like having them installed and available without more work on my part.
Maybe you could give it a try and let us know if leaving out KDE and installing just XFce works fine.
>> It's going to have to be pretty good to win out over Standard, though. >>
SOHO Deluxe comes with a much more recent kernel and thus more hardware support, particularly for wireless and CUPS and has qt4.x libraries, which are quite important now for running or compiling current software. And SOHO includes such useful software as OpenOffice 3.something, the latest stable Inkscape, the latest stable Gimp, the latest stable Scribus, which will not compile on VL6. I haven't run VL6 Standard for months. Throughout the SOHO betas and release candidates, I used the testing version as my main OS.