Welcome to the forum! Sounds like you've got a hankering for omnidirectional speakers, can't blame you... come over and listen to em when you'd like, they sound great (that goes for all the GAS members).
That's true, they need a lot of 4 ohm power to sound their best... I run mine with a Carver THX rated 300WPC at 4 ohm amp (which I could sell along with the speakers), the bass is excellent because of it. As for room size, I run mine in a large room but I've seen a pair on /r/audiophile that's running in a small room where the owner is quite happy with the sound. If you'd like, you can audition the speakers in your own room . One thing to note is the upper treble needs a lil bit of a boost... there is a reason why subsequent Ohm models have a supertweeter. But for those looking for a "warm" sound should find the Fs to their tastes IMO.