I think any decent amp can power them up just fine. They will however respond quite well to added power and upstream upgrades. I’m very surprised how revealing they are compared to others I’ve owned of differences in sources.
As for the size, I think they perform remarkably well size for size. That said, I think John might undersize them just a shade if you like a little bass/impact. Also, look at the room construction and floor substrate. I have a dedicated room in my finished basement, but it's padding and carpet over concrete. No question the concrete floor benefits from a bigger speaker/ability to put out bass.
My room is 13 x 17, closed, 9ft ceiling. The 2000’s would work. I have some 5000’s (and I have the treble and midrange in the + position, midbass and low bass in the neutral) and love them in here.
That said, I just had some Pro-200’s upgraded to Pro 3000’s (pretty nice!), and they do a pretty darn good job of thumping the room. One they broke in a bit, remarkable what they do for their size. While my 5000’s are the "square" cabinets, the Pro 3000’s use 3000 drivers on a round "cabinet". I think there are some advantages to the round cabinets.
The 3000’s bass I would be very happy with without a subwoofer also, just like the 5000’s. That said the 5000’s can absolutely thump the room. The 3000’s thump/punch, but not quite like the 5000’s. They might sound a shade tighter though.
Ultimately I’ll likely sell either my 5000’s or 3000’s as I have another pair of speakers being built. But, I’ll keep one set I suspect for another room. The OHM's do some very cool, fun things.
