That's a great result for Stage 1. Must be very healthy to make 255bhp. Your torque curve in the other post looks very smooth too. I had a Pipercross panel filter fitted between Stage 1 and Stage 2 R-Tech maps while it was being serviced. Can't say I expected much from it, but looking at your results, maybe it's helped more than I expected.
300lb/ft is about right for Stage 1 R-Tech. Yours seems to hold that torque better though. This is my Stage 1 map (everything bone standard).
You can see it dropping off quickly as soon as it makes peak torque a shade under 300lb/ft.
It's a different story now, I'm Stage 2 with a full Powervalve and it makes 270bhp and 345lb/ft.
If you're keen on taking things a step further, the downpipe is the next big restriction. Sort that (ideally with a full turbo back system) and you'll be ready for a Stage 2 map.