I don't think that number is excessive and the drive may actually last you a while. Check these daily for a few days and see if the reallocated sector count or the current pending sectors starts to rise. If the numbers are rising, replace the drive, if not, you should be safe.
NOTE: Regardless of the condition of the drive, you should always have backups of data you feel is important. Most posts in the storage section are "how do I recover my data". Usually if you have to post that type of question, it's already too late.