I have a 2013 Specialized 9-spd Sirrus Elite Disc. It has almost 5K on it. Worth around $450 now. I'm 215lbs, 67 and ride hills a lot in Seattle area. I've swapped out the RD to a long cage and changed the cassette to 11-36 for easier climbing. At one time the chain came off to the inside of the rear cassette and gouged some spokes. The limit screw wasn't adjusted properly. I've replaced 4 spokes from that. The LBS says to replace the wheelset. The rear hub has a grinding noise and they said the sealed bearings aren't replaceable because of availability. So, I need to determine the best course of action. Should I replace both front and rear wheelsets or just the rear? Any recommendations you have for wheelsets that fit my application would be appreciated. I don't have a lot of money but I want to be safe riding on a reliable and serviceable wheelset.