Buying Advice Please

[4WayDiablo]

Thanks for the advice folks. I had thought that the HDI was much more expensive to run in terms of repairs than an XUD but i'm new to this scene. I have a young family so safety is important so perhaps i should go for an HDI. I don't want the hassle of veggie oil at this stage. Whats involved in a stage 1 re-map then, and what are the costs? Does this not put the engine under too much strain and will it become less reliable? The £130 tax is appealing. Think I might be swaying towards an HDI.
What goes wrong with these cars as the rear beams seem to be a problem - Do they snap?

A remap can be done yourself for the price of a 'KWP2000+' from eBay (around £30) and the price of a map, depending who you go to can be £30-£150
I believe pro Steve or mr whippy will do the whole thing for you for around £150 last time I saw. May be cheaper now

It will go from 90bhp to around 120-130 on a standard HDI
They're detuned from factory to not smoke when in 40degree heat and to be uber good on emissions, remapping them puts them back to where they should be with a little extra. Never heard of a stage 1 hdi having any problems at all due to the extra power. Even the stage 2 guys at 160bhp don't have problems.
Rear beams are usualy around the end of thier life when you pick them up they will pretty much always be 100kplus on the mileage. But theyre dirt cheap to replace (£60-100)l

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A mate of mine actually got a remap for the price of fuel for a lift (20miles and back)
Another mate got a full remap put on for him for £30.
Just have to sweet talk someone who has a map and laptop to remap