Best active speaker

I had the ATC SCM 100 tower passive with Bel Canto 1000 reference monoblocks (series II) which sound amazing with Stealth ICs.

PMC
http://www.pmc-speakers.com/productCats.php?mode=productCats&cid=5

Other PMC active model-
PMC´s latest active monitor, the IB2S XBD-A. Similar to the industry-standard BB5 XBD-A but lighter and more affordable, and aimed at high-end reference monitoring and mastering applications, each IB2S XBD-A monitor consists of two DSP-controlled, Class-D powered cabinets fitted with PMC´s ATL™ (Advanced Transmission Line) technology: a three-way master and a slave XBD cabinet with an extra bass driver. Each channel employs two of the 10-inch piston bass drivers from the renowned IB1S and IB2S speakers, together with PMC’s hand-built 75mm mid-range fabric-dome driver and the 34mm soft-dome tweeter from the BB5 XBD-A. Each active master cabinet offers 960W of power (200W each from the HF and mid-range drivers, 560W from the LF driver) while the slave XBD cabinets contribute a further 560W, making for 1520W per channel of superbly controlled, low-distortion precision monitoring all the way down to below 20Hz. Controllable via an RJ45 remote, with user-adjustable HF and LF shelving filters, per-channel ±8dB input level trims, analogue input sensitivity from +4dB to +20dB and an AES3 digital input as standard, the IB2S XBD-A is scheduled to ship this summer.

PMC AML2 is well worth a demo!. Great review on the AML1 on 6moons.

Check out the avi adm9.1s + subwoofer. Remote controlled analog pre, DAC and active speakers all in one cabinet for around $4500 including the subwoofer. What HiFi just reviewed them.