I have owned the Ascend 340 SE's across the front with the 170 SE's in the rear. To be honest, I was NOT too impressed. In fact, I was coming from a set of the Paradigm Studio 20 v.3's. Unfortunately, I dranked the kool-aid and bought into that "
the 170's are so much better than the Studio 20's AND the 340's are so much better than the Studio 40's" thing. Needless to say, I could
NOT disagree more.
The recommendation of the RBH's above is a very good one and should be highly considered. There is also the Chane A2.4's you might want to check out. I have owned them and I assure you they are
MUCH better than the 340 SE's inmho. Here is a link if you are interested:
https://www.chanemusiccinema.com/A2.4
Best wishes to you on making your decision!
Cheers,
Phil