You are purchasing the higher-end (cost) of the products listed. That is good, if you've got the money.
If you want a cage, then that is a large investment of time and/or money. (I know, I am currently putting one in myself).
As for the 4-lug, dont worry. I ran for a few years with 245-45-16's Yokohama A008RS-II
(R1-type) tires and no problemo!
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Darius Rudis
Home built t-arm/panhard suspension powered by an S-trimmed motor :-)
My Mustang Page