Hi.
I'm the owner of a pair of N804s and can tell you that there's really not much of a difference between them and the 803Ns. Yes, there's a tad more bass in the 803s (7" woofers vs. 6.5" woofers), but not enough to justify the $1,500 price differential. If I had the dough, I'd go for the 802N, but that's a different price point from where you're at.
The 804s (retail $3,500) are fabulous speakers. The highs and mids are wonderful and the bass is tight and punchy. Unless you're a bass boomer, I think the 804s will satisfy your needs. Besides, you'll still have money left over for additional gear or more music. Think about it.
