I'm surprised there are so many rns510 votes.
Expensive bit of kit that isn't all that compared to other solutions IMO.
Another vote for remap.
After remap, downpipe and stage 2 update.
as i mentioned in the other thread, i think RNS will have a greater effect on your day-to-day enjoyability in terms of the added functionality. once you start to get a little comfortable (read: bored) with the car, then i think a remap should quickly be on the agenda.
also, as an OE solution i think RNS510 is absolutely cracking. wish Audis had something similar instead of the RNS-E tat