HA: A3500 vs. FC/AL

[Seth Rothenberg]

SSA Managers, Help !
I have spent the past month with my Sun Sales rep 
designing an HA system using two Enterprise 4500's and
one A3500, 2x2 "Lite+" configuration.  Now, my boss says 
we need a third host.   So, I asked about the A3500FC.
My Sales/Tech said the 3500FC control module only has
one FC (is that per controller?), and therefore, it is not a "loop",
but really a "hub".  The Sales/Tech did not know if we can
install 3 hosts and 2 controllers using 2 hubs.

IF A3500 does not support 3 hosts, another idea is to just
get two A5200's, which really can do a loop.
However, we give up the Controller Module.
We need to evaluate whether the Read/Write Cache in the 
controller can be sacrificed.  My impression is yes.  I suspect 
my boss won't agree.

The A5200's also have hubs.  I would be interested in 
whether anyone has one of these configurations.

Thanks
Seth