Looking for more detail in a speaker


Kind of a long first post but needed the space to set up my situation. 
I decided to do something about my speaker situation after demoing a pair of B&W 805d’s. One of the tracks played was Sympathy for the Devil. At the beginning of the song, a percussion instrument, either a guiro or cabasa, just popped out at me on the left speaker. I’ve heard that song a million times but never noticed that percussion instrument coming at me like that. I came home and played the track through my system, through my streamer and turntable. My speakers are Golden Ear Triton One’s. That same presentation just isn’t there like with those 805’s.
The GET1’s are certainly decent speakers; are they not designed for this type of detailed presentation? Is it my room? My listening room is a odd shaped man attic with a 3.5’ wall on one side with an 8’ wall on the other side peaking a 9’ in the middle. My listening position is about 17’ from the speakers.  I’m sure the room is acoustically challenged. Also, I have a long speaker wire run, like 40’. Does that contribute to the lack of detail? I figured out a way to trim about 15’ of speaker wire length from each run and plan to do that ASAP. I’m using AudioQuest construction rated wire. I believe they’re 14 gauge.
So, why not buy the 805’s? I’ve thought seriously about them but concerned they’ll be kind of small for my room. Seems like I need floor standers. I’d like to keep any replacement speakers at $4k. I have an opportunity to pick up a pair of Dynaudio S5.4s for $4k but haven’t made a move in them yet. 
Any suggestions on a speaker selection or adjustments to my room or speaker wire are appreciated. To sum it up, I’m looking for more instrument detail with good sound staging either by making tweaks to my current set up or getting another flavor of speakers. Thx. 
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Along with more detail comes, usually, more brightness. I'll cope with a bit less detail for warmth. 
No time to read the whole thread so I might be saying something someone elastic's already has; That 'detail' in the B&W speaker is going to hurt your ears after a while. Get the Dynaudios. You won't regret it.
@pimbo why do you say that about the Dynaudio’s. Don’t know that much about them. These 5.4’s are about 18 years old. Please tell me more. Thx. 
Bfora. I have the MC-152 / C47 in my office system playing through the 805
d3’s. This system sounds incredible and seems to check your search boxes. Why not see if BB Mag will set up the d3’s in your room? If you go the 805 route I’d strongly suggest the d3’s over the earlier models. I went that route starting with the “S” model. Enjoy your journey. 
Thanks for the input @dmbwires. That’s a pretty close “Apple to apples” comparison. I’ll listen to the original 805 D’s in my system this weekend but will keep the 805 D3s in mind as I heard those this past weekend. There’s a smaller Audio dealer in town that sells B&W’s who might let me audition the latest model in my home.