I just sold an NEC SL2100 to a very small office. Two loop start analog lines and four phones. They weren't interested in UC Suite, IM or any other neat software add-ons. They did go with IP phones, so they can work from home as needed. Don't know how much they will even use the auto attendant, but at least it's in there.
I also gave them a price on the SV9100 and explained what they would be gaining, but in the end, the 2100 will work for them at much less cost.
Perhaps the 2100 is overkill for this 2x4 office. But it's good stuff and as you say, not many to choose from.
Jim
