2x Pentium D 3.0ghz processor (I know, its old)
8600gt GPU
3GB RAM
It's really not that good... at all... but hey whatever, that's why there's always the 360
You'll be able to run it with no problems.
I just got done with a playthrough where I had 50 hours, and did not do everything. Glad to know you are enjoying it though.
As for Awakening, it depends on you. I really hated the beginning because instead of story and dialogue, I got combat. After that, I started really liking it though. Be careful though, there's a [censored]load of bugs. I had to restart because I could not do a companion's quest.