Yep, the slide show features are really cool, and it does tend to impress the significant other.
Movies? Maybe something like The Prestige if she hasn't seen it. I've been buying a lot of BD movies lately and I have continued to be impressed with the video quality of all of them. I was really surprised with Kung Fu Hustle - the video quality was extremely good.
I agree, I use Highdefdigest as a factor in whether or not I buy a particular movie and so far, they are a good gauge.
Congrats man!