nylon roll cage is the only way to go if your bashing... the bodys just dont last...

have a look into making your own, i'm about to purchase some nylon rod and look at making then for most my cars...

check out these: http://cgi.ebay.co.uk/HPI-savage-25-...ts_Accessories

look really easy to make, and from the video... they look plenty strong!

the nylon is dirt cheap... i say go for it!