[TowerTalk] Ground rod connection: Cadweld or ????

[Bob Kellow, W5LT]

HI All:
I am putting in a ground system at my new QTH. Will have a ground ring at
the tower with (4) ground rods, plus (2) radials plus a home run separate
but in parallel with the RF and control cables running to the tower from the
shack (about 90 ft).
There will be three rods along each radial leg. 
I know Cadweld (or equal) is the best ground wire to rod connection, but
what should I use as 2nd best? Cadweld seems to be rather expensive, and
takes some skill to implement.
Open to any suggestions.

Bob, W5LT