Glad someone posted these; they look great but NRC got sensitivity of 86dB. At that point, depending on listening distance, your amp price creeps up a bit more than it normally would especially if bass extension is of primary concern.
Re: R5 some have mentioned here, I'm not sure I'd go that route myself. I'm not qualified to speculate on exactly what caused the deviation from the R3, presumably "all of the above" (driver/cabinet size especially), but R3 is much better to my ears and you lose almost nothing in extension when properly placed. I've had whole R-series save for R7, you don't need measurements to realize R5 is bastard child - almost better to think of it as floorstanding LS50. You can buy my R5's if you don't believe me
Also, realize you can go a LOT further depending on your time horizon and tolerance for blemishes gear. My R11's were only $1500 + some black nail polish to make then living room friendly.