Questions about various onkyo recievers

[BLindsay]

The following questions apply to the following recievers

SR606
SR705
SR706
SR805
SR806


1. In regards to the 805 vs 806, video upconverting doesnt seem to be there on the 805 like it is on the 806, but if im using my s350 blu ray player to handle that, that feature wouldnt matter to me correct?

2. Which of those have pre-outs, like if i wanted to buy a bigger better amp to drive my speakers down the road

3. Do the burr-browns really make alot of difference? 805vs806

4. on the 806 it says "BTL Capability For Front(210W) " Is that bridging? if so what channels amp i bridging to yeild that power? im only doing 5.1 so i dont need the surround backs

5. the 805 does seem to have an edge over all of the others in sound quality? higher s/n ratio, lower thd%.

6. which of these is the best Audyssey MultEQ or AudysseY MultEQ XT

7. Why does onkyo on their website list the 606, 705, 805 as 7 channels (found in the specs) and the 706, 806 as 7.1?

8. what is Dual PUSH-PULL Design?

9. Is there really much difference between the thx certs? None on the 606, select2 on the 705, select2 plus on the 706, ultra2 on the 805 and ultra2 plus on the 806

10. the 705 and 805 seem to only be hdmi 1.3 instead of 1.3a, is this gonna hurt me in anyway?

11. did they change the way they measure THD% because my 15yr old sony ES reciever is rated for .04% thd so im suprised these new ones are higher?


Sorry for all the questions but i dont make alot of money so this is a big purchase for me so i just want to weigh all the options and know the facts before i buy one (plan on buying next friday, pending these answers and the availibility of the recievers)