I beleive they are sort of in the same price range.
I suppose so....
Any ideas or inputs on the bowers and wilkins 683s compared to the wonderful Philharmonic-1?...
Well one speaker, by high fidelity standards, is awful, and the latter is world class within its SPL and extension limits.
may be I can add a HTM-61 center channel ?
If you want to ruin the experience...
I hear center channel is good for movies .
Possibly, though i don't consider them vital.
Btw , do you guys know if Dennis makes the center channels ?
I recommend you read this (reasonably short) thread from the beginning as many of your questions have already been answered. But yes, he does.
I have a smaller room (14 x 28) so i 'may' be okay without a subwoofer to start with.
Not quite sure what having a smaller room and not needing (multiple) subwoofers have to do with each other, but yes you can live without a subwoofer, although the LFE channel in movies will be neutered and your frequency response will be determined by boundary interactions in the bass.