If you have somebody with nanocom to load the map i'd recommend this https://www.alivetuning.com/product/nanocom-remap-for-td5/ also if you are concerned that a de-cat pipe would be probematic you can find somebody handy with pipes, he can cut the exhaust below the catalyst, rip out it's internals and weld it back... nobody will konw if it's well made and you'll have much better throttle response, a straitght through middle pipe would be good as well these are not so expensive as an intercooler, for a remapped engine it's very important to have as free as possible air flow

I have used Empire and Td5 Reborn, bother were very good. The latter did a high power map which went very well with low EGTs.

Mine was done by Storm tuning 2 years ago. I have downloaded my map using my nanocom sent it, get the modified back within a day, uploaded and job done. Very satisfied with the result as well.