Do not worry – you can sit as close as the soundstage start to be too high. You do not have choice ! You must have space behind you ! Position yourself that speakers have space behind them and that there is space behind you .. Well..difficult with 10f size of room …
Btw I listen SL where owner was sitting like 3F from them and had huge space behind him. I was in the middle of the orchestra … amazing sound .. Different rooms, different choices…
D