I'm slowly building a knitwear collection and so far I have a navy and a grey cashmere crewneck from Colhay's, but I'm having trouble deciding what to go for next. I find having different weights of knitwear very useful and I also find navy and grey very useful colours. For that reason I'm thinking of picking up some heavier weight lambswool crewnecks also in navy and grey from Rubato. However, it does feel like I'd be buying the same thing even though obviously I'm not. Would you guys recommend getting the same colours in knitwear in a different weight, or should I branch out to different colours or something else?