Rega Planar 3 RB880 Upgrade Worth It?

Question for the group to help me make my decision...

I have an upgraded Rega Planar 3 (Groovetracer reference subplatter, Neo PSU, Exact 2 cartridge).  I'm considering upgrading the RB330 to the RB880 tonearm & wondering if the upgrade is worth the cost.  I know most of you will say upgrade to the 6 or 8 which I have debated...but I like the look of the P3 & am happy with the performance.  Maybe down the road I'll upgrade the whole table but not looking to make that investment currently.  Thoughts on whether or not the RB880 would make a meaningful improvement to the P3?