I own N803's so naturally I am going to tell you that it is the right choice. I have had the opportunity to hear the F30's driven by Levinson gear and they sounded really good. I would go so far to say that in each respective price point each of these speakers are price/performance leaders, especially if your musical taste leans toward classical, jazz, folk, and non heavy metal rock. If the price difference is less than $1500 on the used market I would tell you go for broke and pick up a pair of N803's. If the price difference is around $1500 on the used market the F30's is a better bang for your buck.
Happy Hunting,
Drew
Happy Hunting,
Drew