SME Series III Tonearm

I just bought turntable at garage sale. And now I would lke for those with some knowledge of what I have please tell me how you would rate it. To start with it's a Rega Planar-3 with SME series III tonearm. The needle Sigent AM10S. I have pictures, This is not for sale!!! I just bought a new Rega-P3 cover and entend to keep it. I am just wondering what I could do as a check up etc. I am thinking of changing the neeedle bacause of age. Old school knowledge reminds me that needles are only good for 5 years or so. everything seems to work great. Plays at correct speed. No hum has sparkle in the high notes. Dirty with old dust needs cleaning on the gold SME arme everywhere realy. Helpful sugestions. Paid $200.00 if you have read this far you deserve to know. Don