Shocks, generaly good quality on the Lazer (no need to change), mabey just a change of oil & spring/piston.
MUST have the ally front brace to stop major breakages.
Look at front shock tower mount & carbon shock tower as well. Search all posts on here, inc
http://www.oople.com/rc/index-reviews.html (ZX-5 review & look at Keen Hawk review), setups, tips - you should be good. Do you get the one way options with the RTR ?
BTW - and we know what a Dark Impact is, good strong car from what I've been told.