Speakers and depth...

sideways...i own 3 pairs of castle harlechs and they are superb.....an incredible value too.

s, b+ws have a bbc style dip in the mids and imho, tend to compress the perspective and have less less natural contrast than a speaker with a flatter amplitude through the middle. so what you really need to think about is if you want a speaker that protrays things in a more distant way or a speaker that sounds a little more imediate but actually shows more depth of field.
for eg, hold a record jacket at arms legnth parallel to the floor and see how the 12 inch depth looks considerably less than 12 inches. now move the jacket up to your nose and still parallel to the floor and notice that the record jacket actually looks deeper and less compressed in depth.
so, do you want more depth or a more distant perspective? they are not the same thing.
b

There are a lot of things that affect percieved depth: speaker choice and design, amps, sources, placement and room.

I've got a friend who comes over and likes to toe-in my speakers for his taste but I prefer them with no toe-in because I want a laid back soundstage. I've got dipoles and that may not apply for yours.

Get the speakers the greater of half their distance to you and 4' off the wall, don't sit much farther away than it takes for the drivers to properly integrate (7' from a line drawn through the tweeters with speakers positioned in an 8' equilateral triangle works for 4' high speakers with woofers down to floor level), and get back to us.

Placement has more to do with image depth than the speakers you bought.

What amps, tubes, interconnects, speaker cables are you using? Is there anything standing between your speakers? Everything is critical when trying to recreate ambience information with a system. If that's an NAD 3020 you are referring to: SS generally does not exhibit much in the way of sound stage depth.