In all honesty, I would be more worried about the Ascends in terms of WAF than I would a sub. Textured black, but then again, it was you who was pushing for the (ok I had to look it up) Awlgrip.

Well, the 170SE are boxy looking too, FWIW.
Otherwise, I think it's a great value. Yeah, it needs a sub, at least in your place it definitely does.
I looked up DIY kits (as they seem to be a very good compromise for someone like me), and items like the recession buster are sold out (not that they were full kits it appears). In any case, albeit with hopefully a higher budget, if I ever upgrade speakers, I'm guessing it will be some DIY or at least semi-DIY.
If this is for "anyone else", I am happy with the suggestions here. Well heck, even you liked your Dyns, so yeah, I think it'll work out.
Well, they don't have the resolution of the Dyns I've heard (only Contours or better), but you can get more extension with even slightly better sens than the Ascends with a (superceded) PSB combo.
edit: I know I keep referring to you, but I find it hard to recommend stuff for you on any particular budget and wishlist . . . . even if for someone else
$200 center, I recommend the C60, but likely too big for this situation.
http://www.saturdayaudio.com/picturepages/all_psb_specials.htm
$280 for the oversized bookshelves, B25s (they crank very well for their price point and marketing/design intent).
http://www.saturdayaudio.com/picturepages/image_specials_march.htm
$400 for sub . . . . . . . . um, a Dayton kit (pending further investigation):
http://www.parts-express.com/pe/showdetl.cfm?partnumber=300-760&source=googleps
edit#2, sorry same sens on the B25s; I had my own PSB mains' specs in mind . . .