Hi , I m a newbie here so sorry to start with a question.i m looking to improve my current hi fi set up I currently have a rotel ra-810a amp, arcam alpha 7se cd feeding some mission 761 speakers. I also have a 2tb nas drive which I m attempting to shift my cd's to and a sony portable hi res player , which I have connected up using a 3.5 to stereo lead. I've been told by the wife that I got the green light to slash some cash on some improvements . Trouble is I don't really know where to start. I m not overly computer savvy so can currently only play the music off the nas via pluging an ipad into the amp via the 3.5 lead. Any advice would be really appreciated. Budget is about £500-£750 . I m primarily looking for improvement in sound quality then ease of use.