Best €2500 sub purely for music?


I recently was lucky enough to try a demo between a two rel 9tx and one s510, and I though the s510 was vastly superior. My only hesitation for being one was that the EU pricing of rels are kinda steep, and maybe im not someone best suited to use them? To explain, I use a minidsp shd preamp to control my entire system. With that I always use a high-pass filter with a extremely sharp roll off of -48db. Anything above 60hz is given to the speakers. I found this to sound night and day better than trying to cross any speaker with their natural cutoff. This is antithetical to how rel designs their subs. Lastly, it only has phase adjustments of 0 and 180. Its for these reasons why im asking you if there are any alternatives to the s510 you recommend between €2k and €3k IN EUROPE (so no svs or rhythmic or any other US brand of any sort) that might be more appropriate for a purely hifi application?

My speakers are German physiks hrs-130's. They're omnidirectional, but what is important here is they a sealed design that is extremely precise and fast, but its not enough SPL for synthetic music. The lesser rel's arnt as fast as it, so I ask for something equivalent to the s series. I only want one, and my room is 30m^2. I will be using the full Dirac calibration of the shd to integrate it, so subs with on-board dsp is completely irrelevant, and I'd rather not spend on a feature that's useless to me. What other options are available here? 

endymion_joshi-godrez

@ronboco 

I stand by my comment that towers can do well below 60hz. 

I really don't deny that. I have heard Paul and other experts say that nearly any full range speaker can benefit from subs — not just do well below 60hz without them, but benefit. Now, whether that is a big or small benefit would come back to how severe the room issues are. I think we are in agreement!

Damn, my heel, Mr hilde coming in cluch the facts, too bad he still can’t read. 

Too bad you can't write — or use a spell checker. Let's review: the word "heel" is nonsense in your post,  "cluch" is not a word, and you do not know when to use a semicolon instead of a comma. Seriously: have you had enough education to post on this forum? I'm beginning to doubt that.

@grislybutter 
Exactly. A forum is not a test where you answer the OP's post. A post starts a thread, and then we write whatever we want to contribute, no matter what the OP says. The OP is not the boss of us.

Fair game, it auto corrected me because I use both the German and English keyboard. I didnt see both of them were still wrong. You can't be emotionally compromised because of a intermet forum. That remark should of had no impact on you whatsoever, because it was true. 

"if there are any alternatives to the s510 you recommend between €2k and €3k IN EUROPE (so no svs or rhythmic or any other US brand of any sort) that might be more appropriate for a purely hifi application?"

But yes, that spelling mistake was pretty bad all things considered. 

@hilde45 

I completely agree subs can help even with a good room. I would actually like to try 2 sometime. Happy listening !

@ronboco Maybe I could loan you a couple for long enough to see if they're what you need or want. We can talk!