The B&W Nautilus 805's got a good review in HiFi+ magazine (a British high end audio mag), which said it is a very good speaker for most kinds of music (although not the best for rock). If you particularly need a monitor-style speaker of modest size, then the B&W 805 is certainly worth considering.
However, since you ask if there are other speakers in the $1600-1800 range that are better choices, I have to respond that for this budget I would strongly suggest the Vandersteen 2CE Signature (which was recently chosen by TAS as a "Best Buy" among speakers costing less than $2500). And if you are willing to buy used speakers, you can get the Vandersteen 3A's for around $1800, which is a full-range speaker that offers substantially better performance than the B&W 805. The Vandersteen speakers also work very well with McCormack amps.
However, since you ask if there are other speakers in the $1600-1800 range that are better choices, I have to respond that for this budget I would strongly suggest the Vandersteen 2CE Signature (which was recently chosen by TAS as a "Best Buy" among speakers costing less than $2500). And if you are willing to buy used speakers, you can get the Vandersteen 3A's for around $1800, which is a full-range speaker that offers substantially better performance than the B&W 805. The Vandersteen speakers also work very well with McCormack amps.