Paradigm Signature Sub 25

[Alpha Sixx]

Hello guys and possibly gals! Help n thoughts needed here. I was planning on upgrading my 7.2 HT setup to a 9.4 setup by adding an additional 2 subwoofers and 2 more speakers and also a new receiver the Denon AVR4810CI 9.3 . But my focus is the Subwoofers which I am going to eventually add wich I have not heard yet. I am looking at getting 2 Paradigm Signature sub 25's. I have experimented with 4 subs before with excellent and amazing results. I connected my 2 supercube references and 2 older Yamaha 10 inch 250 watt subs. The Defs handled the low bass and the Yamaha's handled the higher louder bass. It was phenomenal it filled the room with ease and at low levels and it seemed that the bass was produced effortlessly. But I am in an apartment for the 1st time in my life and can't go nuts with the sound, but I will be moving to a house shortly. If I add the Signature sub 25's combined with my SCREF's I think it will all be low end bass. I would prefer 4 identical subs but 4 signature 25's would be way too much, I can handle the upgrades and only 2 Signatures 25's right now. Has anyone heard them? I have only read reviews. Any thoughts and suggestions would be greatly appreciated!