long winded receiver question

Some background first....Been very happy with my B&K 307 for many years now. Power,processing,SQ, all outstanding. I added a bdp recently,a pioneer bdp 320, happy with that, I run legacy focus 20/20's up front and some fx500 for the rears and thats it,no center,no sub. The B&K allows signals to be sent to assigned speakers. So if no center or sub,those signals are sent to speakers designated as large,instead of being lost. Bass management is also done in the digital domain. So no sub in my set up,but when I play a regular dvd,that signal is sent to the fronts, the focus handle this very well.Follow me so far? It does this only in the digital domain though, not by way of the analog inputs. Found this out when I had the bdp player hooked up by analog,but seemed to be missing something in the lower end. Crap, it hit me,and sure as shite, it doesn't do this re-routeing in the analog domain. So here is problem one. As we all know by now,all BD are not created equal. Some don't have a plain DD soundtrack. Been researching avr's and can't find info on how they re-route signals,if any do,in the hdmi world. Was looking at the Pioneer Elite vsx 21 txh, the bottom of the elite line,but for 500 bucks, you get alot. So questions remain.....

1- Do any receivers send the new audio codecs to assigned speakers without loss of info ?

2- Is the re-routing of signals an exclusive thing to B&K ?

3- Am I **** out of luck because buying a center and sub is out of the question right now?

I realize a center and a sub added would make the world go round but cash is tight. The center and sub I would need to keep up with the fronts would add 2 g's easy and thats used. The addition of a hdmi receiver seems more cost effective, if they did signal routeing like the B&K that is.