So what have we learned from this exercise? Probably nothing. Some people like FR and some like speaker cabs. The FR crowd can't even agree on one particular FR solution that sounds best. The speaker cab guys split between the Kemper Kab and traditional guitar cabs. The traditional cab guys are all over the map as to which speaker sounds best. The Kone guys split between the Kemper Kab and putting Kones in a regular guitar cab.
Just like pickups, strings, guitars, tubes, picks... even Kemper profiles. This is something you just have to sort out for yourself. Try your Kemper in as many different scenarios as you can until you find something you like or find the tone you are looking for. If you purchase something without having heard it try to buy from a retailer that allows returns if it does not suit you. There is no one size fits all in the "off the rack" world we live in.
I chose FR and chose the particular FR unit I purchased (two of them, actually) based largely on the glowing endorsement of a well respected member of the Kemper forum. He has since moved on to another FR unit and then to the Kemper Kab, if I recall correctly. Luckily, he was spot on about the first option. So, there you go.