"i was also thinking that they would sound better with a more relaxed,warmth sounding av receiver but i don't know much about each receivers sound qualitys..."
Harmon Kardon AVR354 will fit that description, sonically, for new. Plus you'll have the newest codec's (don't know why you'd settle for inferior resolution, otherwise). Used, most any Denon - the better ones obviously more expensive on used market. So shop around. Also, yes, the Arcam used is superb sounding, but no new codes, HDMI, and no EQ (I think).
"i was thinking to go seperates but do not want to go overboard".
You do have $8k speakers, why would you have $8k speakers and drive em with cheaper electronics?
Overboard? You can easily put together a budget separates system for maximum sound in that budget. You could do a moded HK AVR354, and have money left over for a good outboard amp from Rotel,Parasound,Adcom, etc, that will improve sound, no doubt!
good luck