Have 2 parts of my query:
1. How do we differentiate between these two speakers - (want to use mostly for HT)? I think price wise these are almost same though.
2. Compared to Klipsh Reference RF62, will these sound brighter or clearer or sweeter or overall much better in terms of details and soundstaging?
Finally, can B&W 703 and/or JL Lab 836 run using a mid quality Pioneer, or absolutely need a Rotel 1000 series?
Will appreciate your input very much...

So I am looking to start expanding this as a hobby. I am looking to begin with a set of three front speakers. I have inherited a descent Polk sub and acceptable polk bookshelfs (sutible for surrounds) so I immediately was drawn to products from that company. I was wondering if in an apartment (not tiny but not enormous) would the RTi A6 series be over kill and a waste of money as compared to the A4? And the similar question as to the center channel. Finally I have a friend who is a stereophile recommend the PSB Alpha B1 series.