Having played with a pair of Quad 989s for over a year now, I would have to say you will be losing a lot of what makes a Quad, a Quad.
In my room, which is 23x21, with a sloping ceiling going from 9 feet to 16 feet and one side of the room open 16 feet ( from a foyer ), I have had to place the 989s 5 6 feet off the back wall, and 5 feet off the side walls. Placing them so close to the wall will waste your money. This would hold true for any dipole speaker as well. There are plenty of good speakers out there that might be OK up against a wall. As a general rule of thumb, almost any speaker sounds better if kept off the back and side walls. Results and effect will vary with each brand and model of speaker.
You may very well find a different brand or type of speaker that will sound better that the Quads in your set up, even though they might not sound as good as the Quads if both were set up in open spaces.
Remember, a great top dog speaker sounds great because it is set up correctly, and yes there is a correct and incorrect way to set up and speaker. A great speaker that is set up incorrectly, may sound worse, that a lesser speaker that is set up as intended. Example. In my room I really wanted to place the Quads on the long wall. That wall has a wonderful view to the outside, with two large ( 7 foot x 7 foot ) casement windows, and a fireplace in the middle of the wall ( total of 23 feet ), the opposite wall is open 16 feet. Tried as I wanted, and the Quads just sounded to bright and brittle when placed this way. By the way this position was the best for furniture setups as well. We are now looking for custom drapes that we can use on those two windows. My thought is that I might be able to get away with placing the speakers in the position I want, and use the drapes as a sound control item. Open for casual listening, and close for serious listing. This would probably limit the serious listing to the dark hours, since closing the drapes during the day makes the room way to dark.
Recently I walked into one of the national audio chain stores, but not a big box store. I noticed they had a room with a small pair of Martin Logans and a Krell amp. I asked if I could hear the set up. I had a few CDs with me that I knew well. The set up was awful. Based on that set up ( close to the wall, and only six feet apart ), I would never, ever, considered buying those speakers. A few weeks later I was in another store ( in the same town ), who come to find out, had the whole Martin Logan line up. I sort of joked with the manger how I had already heard the small MLs in another store. He laughed. He said that I had not heard them set up correctly. I was game, and had the same selections of CDs with me. Boy was I blow away. It was a night a day change. Based on hearing them correctly set up, I recommended them to a friend. I them when into their big home theater room and listened to the ML Summits, and again was floored. Based on being able to hear the speakers set up correctly, I am thinking about maybe buying the Summits and selling the Quads, ( yes I miss the visceral bass about 50 % of the time )
Give us an idea of your room size and why only one foot off the wall ??