Yokomo shells hands down, tough as nails - SD-GDBFBS Yuke's SYMB GDB is a nice shell - here's a link to ebay, there's a bunch on there, great think also about Yok bodies is you can get light buckets for almost all their shells.

http://shop.ebay.com/i.html?_nkw=yok....c0.m270.l1313