CHiptuning on diesel ???

Hello. I drive an Omega 2.2 DTI from 2001 and am already thinking all the time about whether I’m doing a chip tuning with him or not. I’ve actually informed myself quite well about it and know “grob”. Unfortunately, it seems to me that I’ve got too much information about it, get opinions from friends and from “experts” so that I’m more or less back at the beginning. Angote is enough for this and the prices for it range from about 500 € to over 1500 €. On DSF at Tuning TV also came a report about DTE Systems but unfortunately I only saw half of it. So if I had an opinion or a advice I would be happy to read it. mfg