I know I'm going to be in the minority, but I had the forte II, did the upgrades, and have the 4.2's and did the same. For me, and my system, even after the upgrades the forte II still gave me listening fatigue, so I sold them. I also use tubes and tried all types of placement and wanted to like them, it just wasn't working for my system.I had both sets and did A/Bing, blind testing etc. I personally favored the 4.2's due to the front passive radiator and easier overall placement. They are pulled out 6 feet from the back wall,and 3 feet from the side walls in my 14x24 room.I couldn't do that with the forte's due to the rear passive.