Directional Driveway Sensor Choices?

["Bob Sisson" <bob@xxxxxxxxxxxxxxxxxxxx>]

In doing far too much research I have found TWO (2) very different
approaches to Directional driveway alarms that use probes.

I am only looking at probe systems as I really don't want to cut up my
driveway to put in loops.

The First solution is the Central Processor with probes (similar to :
http://www.smarthome.com/790908.html)

The second solution is to use TWO (2) Cartell CP-2's and connect the
datalines.

The cost is relatively the same.  as the Central processor version is ABOUT
$500.  The cartell solution is little less but you need 2 units.

My question: Who has used these and what were your impressions?  Which do
you prefer? Why?

My probes will be about 350 cable feet from my panel, about 40-50 feet from
the road.

Thanks for the input....

Ooops, one question about the Cartell, do I need to run BOTH cables back, or
can I just run 1-set the 15' between units, and then splice THAT to the long
run back the house with power and two relay closures? (3-pair shielded?)


Bob