Contrary to popular belief, having hard shoulder caps is not an indicator of protection. Playing contact hockey would be better served by having a soft shoulder cap, or, if you can't get that, a cap that's as low-profile as you can.
What are your preferences for fit? Some fit bulkier so if you want hands-down the beefiest protection, there are pads for that. If you want a slimmer, more tight-fitting pad, there are options for that and finally, if you want a very mobile and lightweight pad, there are options for that too.
A lot of it is personal preference and comfort so your best bet to obviously try on a few yourself, but if you can tell us some of your preferences, we can give you a few starting points.