the chosen one lego fan

Hi friends i have one important question.I was a collector of LOTRand hobbit ,but now i decided collect a Star wars theme,Starwars is a big universe and i m not such rich for collecting everytime and every side.but i think more people collect a light side,so i want collect dark side, My question is may i going to buy a new star destroyer or older Malevolence, ?Do you consider Malevolnce as good set? or expecting new star destroeyer wil be more quality. thank for answering,sorry for my english