which speaker?

ok, my equip is pretty low-brow; I have a Kenwood receiver that is 80W x 5, 3 digital outputs. I use a sony PS2 as DVD/Cd player with optical output to the Kenny. I have HDTV setup. Speakers currently are wharfedale bookshelf diamond 8.1s, wharfedale valdous center, and a kenwood sub that came with receiver (not self-powered). My question is, in my search for better sound within price range that my other half won't kill me for I have come down to KEF Q5s for about 600-650 - connect with good cable, push the little wharfe's to the back or go old school with some Dahlquist DQ-10s up front (crossover + new caps done on them 2 years ago) and put the few hundred bucks I save into a fund for a Denon AVR-5803A, Pioneer Elite VSX-59txi, or the new NAD receiver (773?).
Seemslike with either speaker selection I will also need to upgrade sub in near-future. I also will probably upgrade DVD player as well.

Which is the best choice for my beginning journey - the KEF Q5s or the Dahl DQ-10s