More Access Points or Fewer Higher Density Models?

Hi

When planning wifi deployments for high density environments such as open plan office spaces, is it best practice to go for more access points to spread the load or fewer access points but of a higher end model e.g. more antennas etc.

We are a Meraki user and I am weighing up whether to go for Meraki MR33 or one of the higher end models such as MR42 or even MR45 taking into fact that for the price of one of these I could get atleast 2 MR33.