I've ragged my 002c around and broken 3 front arms, 1 rear hub carrier and a bulkhead twice. A smash is always going to happen when bashing. Something has to give way mate and if my arms were alloy I'd be pretty screwed.
Personally I'd wait for the 002c. Its well worth it. In my opinion its the best of all KM baja models.
I upgraded the bulkhead to alloy and find it to be excellent. My thoughts on the bulkhead being alloy was that the strength was in the right place and if I have a bad crash the nylon will give way. Which is exactly what has happened.
The thing is, whether you get nylon or alloy, parts will break and that's that.... So its break an expensive alloy part which could bend more parts or let the nylon take the hit.
Alloy is for bling, plastic is for bashing
Edit - Add more money on you purchase for a set of hostile tyres...... Rather spend less now and upgrade the right parts