Patrick
I plan on using 05+ Mustang GT bump stops which are fairly long and can provide a secondary variable rate spring at near full jounce.
A couple of other possibilities would be to use something like the travel limiter on Fox mustang struts. Another possibility would be the pneumatic bump stop such as used on long travel offroad suspensions to eliminate the pounding of regular bump stops.
http://www.kingshocks.com/bumpstops1.html
