Yes the cost is an issue but I think one sub is already out that would mate very well with the DC's/Dulcets/RV's and would only help them sound even better/more dynamic/open/full and so forth: the vandy 2WQ subs.
At $1295 retail they are a bit expensive for a sub (to me at least...there are many subs that cost substantially more).
So let's say you buy a pair from a retailer and he gives you a good deal...two vandy subs for $2200 (you can find them used for much less if you are patient).
So you have spent $2500 on your DC's and now $2200 on a pair of SOTA subs. So you have full range sound for under $5000 but there is more to it than that...and I have said this before and will say it again:
You get the versatility of stand mount monitors; vanishing act, easy to move around the room for best placement; great depth, imaging etc
PLUSYou get a pair of the best subs out there which you can now place for optimal bass response. Not to mention they will help take the load off your amp and DC's. They will take over at 40Hz and below which is where the DC's fall off anyway so why even bother having them try to play anything that low?
Anyway...when I have the money and the room to do this, I will most certainly be getting a pair of Vandy subs to mate with my DC's (right now I have super cheap subs which are fun for movies but I have heard vandy subs with my DC"s and I know what bass should really sound like now).
END OF RANT.
