- For 50 to 60 users I don't think that load balancing is an urgent priority ; but automatic fail-over is. I would more look into firewall-solutions (not an extra router) which can do PBF (Policy Based Forwarding). These can do automatic fail-over (and probably load-balancing too).
M.
-- Let everything happen to you
Beauty and terror
Just keep going
No feeling is final
Reiner Maria Rilke (1899)