The anglo, being a glorified mouth organ, is for a beginner much the easier to get to grips with and learn to play tunes quickly. However, as you have already found, in the mid term, once you have mastered the basics on an English the instrument is much more versatile and can be played in any key with similar principles to a piano keyboard. As an anglo player with a very advanced model I'm glad I started and continued with anglo. It really depends how far you want to take it and what sort of music you want to play. If you want to play advanced orchestra parts and complex chords you'd probably be better off going for one of the duet systems. You don't say if you have a 20 key or a 30 key. There are some very clever (mostly Irish) players who can play almost anything on a standard 30-key.