Even more on Dual turntables

Thanks to the great feedback, especially from fatboyslimfast I am now the owner of a dual 505-2. took the advice about the cartridge and wow it all sounds great, have never listened to vinyl this way, I always thought 'records' sounded like they did on my old Dansette in the sixties. I am now hooked, saw Richer sounds were selling a brand new  Cambridge Audio Azur 640p for £60 so snapped it up and tried it through my Rotel RA820A (aux input) and Wharfedale diamond 7.1. Great, so now where do I go as far as upgrades are concerned (told you I was hooked) speakers first? amp? and what too? Thanks for a great forum used by equally great enthusiasts.