Sell the RB250 and add the money towards a better arm & turntable. The RB250 will be a limiting factor. Though decent enough at what is really budget level, I've never liked the sound of Rega arms and their derivatives. I've used a Mission 774 arm for many years and tried several Rega arms alongside it and found the sound just bland and compressed in comparison. A Nottingham Analogue turntable with their own arm would definitely be worth a look. I like their products.
It is impossible for anything digital to sound analogue, because it isn't analogue!