Good choice on the receiver. No contest between the DEnon and the Pioneer; the 1803 will simply sound better, cleaner, louder.
As for speakers, the 'packages' you note have gotten good reviews. If I were buying speakers right now, I would pick up 5 NHT Superzeros from onecall ($67 each), and look around for a good sub to match. Perhaps a used/refurb NHT sub, as they tend to match well with the SZs. The SZs are also quite small yet have a really open, clear sound. They wiull sing with a good high-current amp like the Denon.
NOT THE SAME: affect/effect; lose/loose; compliment/complement; then/than; palate/palette; site/sight; peek/peak/pique; advice/advise; allude/elude; holy/wholly; accept/except
SPELL: d-e-f-i-n-i-t-e; r-i-d-i-c-u-l-o-u-s; r-e-f-r-i-g-e-r-a-t-o-r; w-e-i-r-d; c-e-i-l-i-n-g; s-e-p-a-r-a-t-e
NOT ENGLISH: alot; wallah; spendy; would of; could of