Having Listened to the SF's if you are looking for a similar type of speaker 2 way 6.5" mid/woofer 1" dome tweeter in a slim tower GR Research offers completed speakers for $2700/pair, Encore X-SLS, as opposed to $19k. Based on your no frills statements I am not sure if $$$ are an issue. If new is NOT a requirement you have a lot of options in the sub $10k range. Compare the freq response curve and waterfall plots. Also there are independent reviews on youtube you can look at. I have heard the bookshelf version of the Encore I don't think you will be disappointed. They both start to roll off below 50hz.
SLS Tower dimensions:
Width: 8.5″ (216mm)
Height: 37″ (940mm)
Depth: 12″ (305mm)
vs
SF Maxima 44.1″H x 11.8″W x 13.8″D

