The swing-arm bearings are worth checking but KTM do a good job with them.
The stock shock isn't brilliant but the bushes top and bottom rarely fail.
The stock shock can be rebuilt and re-valved by K-Tech for about £275 and is completely worth the money as you get a far better shock than the SDR shock.
(not to be to mercenary about it : I have a stock shock rebuilt and re-vlaved by K-Tech with one track day's use on it for sale if you want)