ok put im puting the final tocuhes on my system. ill be using a Mrd1005 for my sub woofers, and an mrv-f545 (4ch) for my front stage, with audio control crossovers. and it looks like ill be going with a Seas Component combo using this mid

http://www.madisound.com/catalog/product_info.php?products_id=823

now its 8ohms and my amp is 2 ohm stable per channel, now im not crazy on rear fill. but if i throw some seas in the back as well, to play say 90hz-3200Hz (same as front stage mid) that would give me a 4ohm load per ch. now thats all fine, but will i have substantially degrated sound quality in any way?