Pretty bedding -- and I love your ideas! :) How about this paint color -- and fresh white trim (try BM White dove) with fresh white sheers (for the warm weather) -- and then add rich dark chocolate brown velvet panels for the cooler weather. You could also do white sheets for a change with your bedding ... again ... nice for the warmer weather. Add lots of pewter/silver items around the whole room -- silver photo frames; maybe add a silver tray on a dresser with a silver-framed mirror? Here is a link that might be useful: BM -- Silver Fox paint color

I thought of igloochic's glass backsplash for you... you'd have to put a shout out for her if you like it to see whose it is. If this doesn't imbed check the link below. Scroll down to the beautiful glass on the thread Here is a link that might be useful: in case the pic didn't imbed

The raspberry (or yellow) sound great. Are you thinking solid or color blocked curtains? A print/pattern can bring those colors without being overtly "raspberry". People around here are great at finding fabrics.

Skip the accent wall. It just makes things more complicated and they rarely highlight anything worth looking at. If you want some color I suggest a nice sage green. I will compliment the browns and woods you already have but it won't be overwhelming.