Bookshelf speakers that renders 3D soundstage

Ditto - Fritz Loudspeakers could suit. Well built, good bass extension, reasonably priced, very spacious.

I also like the BBC heritage loudspeakers, especially those from Graham Audio. Derek Hughes is a very accomplished designer/engineer.

I have had really good luck with Totem Dreamcatcher speakers.  They are favorably reviewed and a mini marvel.  Slightly larger but still punching well above their price point are the original Andrew Jones Pioneers. Both of these can be found used in great condition at modest prices. 

If you can find a pair of LSA 1s they will make you very happy. Properly set up they will deliver just what you are looking for - at a bargain price. Look for reviews on-line. The original LSA 1s sold for $1100/pair but occasionally come up for sale here on Audigon for less than half of that. Totem Dreamcatchers are also a good choice.

I have one other suggestion, I have a very slightly used pair of Neat SX3i’s that are going up for sale very soon. They are flawless, have about 400 hours on them and never driven hard, always through my CJ CA150. They are in white and will go down to about 25hz as they are an isobaric design (two woofers back loaded). I am willing to sell them for $1,800 including shipping, I have all the original double boxes. Here is the link to them as the dealer I bought them from told me his customers were very sad they are discontinued. They are the best I have heard for that money. Anyhow, here is the link: the only reason I am selling is my Salk SS6M’ finally arrived.

I have to second the QAcoustics 3030i. The sound stage on these are 5 feet past the speakers left and right. The depth is ok but the width is exceptional with my Rega Elicit-R and Denafrips Ares II . I also have Revel 105M speakers and although the sound detail and clarity is slightly better, the Revels do not match the QAcoustics soundstage at 4 times the cost. The bass response is quite good on both.