Any reviews/impressionsons of Ascend Sierra 2?

I am using the LS50's for my desktop system and think the concentric tweeter helps for nearfield imaging and soundstage, since they are so nearfield, but am curious how the Sierra 2 and LS50 compares...

213runnin, by the way, I am very pleased with the LS50's bass response. I do have a couple of subs under my desk-top setup, however occasionally I turn them off for comparison to being on, and sometimes forget they are off, and not notice much of a difference. I think they will be hard to beat for my purpose for nearfield due to their addictive coherence with the concentric driver.

I don't know about the nearfield listening with Sierra 2, I'm about 12 to 13 feet away and they're getting 150 wpc.  In my humble opinion, if you turn the subs off and can hardly tell much of a difference, then you subs are turned too low, or the material might be bass light.  Either way, if you are happy with the sound, then that's all that matters.  

I case anyone is still thinking of getting the Sierra 2's, I'll add my two cents. I've had mine about three weeks, and am very impressed. Right off the bat, I thought they seemed a little bright, but either they've calmed down after burning in, or my ears have adjusted. Part of the adjustment is that they just give you gobs of detail. Probably a little of both. And the bass response in tight, and tuneful - and plenty for me. And probably my favorite thing is they sound fantastic at lower volumes, as I live in a condo.

Associated equipment:
Rega Elex-R amp
Mostly lossless digital files (some 320) from either my iPod classic, or computer.
Peachtree DAC
Highly upgraded Rega RP3 w/ Rega Exact and Rega MKii Fono amp

Speakers I've either owned or auditioned in my home in the past few years:
-Monitor Audio GR10 - pretty amazing paired with a NAD 326 amp - fantastic bang for the buck.
-Epos Elan 15 - seemed kind of dark - didn't keep for long
-Monitor Audio GX100 - nice, but always sounded like you were listening to a speaker - not very transparent.
-Totem Acoustics Rainmaker - way too bright with my amp.
-B&W 685 S2 - Great bang for the buck - great with digital music, but I didn't care too much for them with my vinyl - a little too warm.
-Dynaudio Excite X-12 - the best I had until I got the Sierras - great imaging, tight, punchy bass, and good detail in the highs.
-Dynaudio Focus 160 - hands down the best tweeter (but the Sierra's is very, very close), but the bass response seemed kind of flabby and unfocused.

And it certainly doesn't hurt that the Sierra 2's are drop dead gorgeous. I got the B-stock satin espresso, and I have no idea why they were b-stock, because they look flawless to me - and I saved $300.
Hope this helps anyone else thinking about getting a pair - I think they punch way above their weight.

I can't speak to the Sierra-2s, but I really like my Sierra-1s.  They're attached to my NAD C715 - no powerhouse there, but plenty, given that it's in my bedroom (one man, one house, 4 stereo systems...).

Long ago, I had them hooked up to a Krell KAV-300i with a Carver True Subwoofer.  A friend who is a superb jazz upright bassist listened with and without the sub and preferred them without the sub.