Is there a reason to go w/ the AS-F1 over the AS-F2 Athena floorstanding speakers? Will there be a huge difference other than bass extension on the AS-F2's? A subwoofer should make up the difference, right? I have a Sony DA4ES receiver w/ a Sony SAW-M40 powered sub. For those of you who have done a side-by-side comparison, will I miss anything going w/ the F1's over the F2's besides a little more bass? Thanks.