I think we spent about 3k on the worktops and we have a pretty big kitchen&utility room and that incl windowsill, kickbacks and a big splashback behind cooker.
I think they have different finishes depending on colours you choose. We have tile splashbacks but the top we choose seems to work well but I suppose would depend on the tiles you have and the design.
I probably wouldn't choose the drawer and cupboard handles again from them - I liked the ones we picked but they didn't have that much choice and could probably have got cheaper elsewhere. As they were doing the cupboards seemed easier just to get them to do the handles but probably not that hard to do yourself.
Def work getting a quote! Love our kitchen now and really easy to clean. We had wooden worktops before which was a nightmare to keep clean/dry etc.
hth