Just got the LT out of the shop having a valve guide leak repaired and the shop said I have a small leak on the rear shock. They have OEM and other shocks available. Said if I change rear I need to change front also. What shocks would be best to put on the bike? and is it a very difficult job to replace them yourself? or should I just get OEM again? The LT is an 06 and I have about 40,000 miles. The seal and radio (it was not working) were both replaced by extended warranty.