LNA and RF switch positioning

Hi,

We are designing a new multi-antenna RF system, in which 6 antennas are connected to an RF switch (a SP8T) itself connected to a SDR. We ask ourselves where to put a LNA: between the antennas and the RF switch (1 LNA per antenna, so 6 at all), or between the RF switch and the SDR? The first solution seems better according to the law of Friis, but it is much more complicated (integration, power supply ...).

Do you have any advice on this?
Jack