I have the original Ascends 340's and 170's. They've since come out with and improved SE's and then the Sierra's - first monitors, now Towers. I was told that the Ascends were very neutral, and very clear. They are. The SE's may be better but I never once was tempted to buy them as, it's funny, but the orignal's sound never changed when the 'new and improved' came out lol.
I've had the Ascends (a full 5 channel set with a 340 center as well) for seven/eight years now. I've lost a logo from one of my dust covers, but otherwise they still sound great.
And the price for those five speakers were very reasonable.
If I were in the market for another pair of speakers, I'd have the Sierra Towers with the RAAL tweeter at the very top of my list. Of course I don't know your system, your room, and your personal tastes, and there are a ton of great speakers out there, especially ID, so I'm sure whatever you end up with you'll be happy. Good luck and keep us posted as to what you end up getting.