disco 1 3.9 lpg kit recommendation

I have seen RPIs single point kit for £525 without tanks which they recommend for the 3.9 but Tinley Tech also do single point £700 ish and a multipiint with twin tanks for £900 ish.

Is there a "preferred supplier" as I dont want to get ripped off nor do I want to buy rubbish. My engine is completely standard and I do not intend to tune it etc.

Bought my multipoint kit from Tinley - can't fault it or them. Installed it myself, with several phone calls for 'HELP!!' which were all dealt with efficiently, they checked and certificated it, 18 months down the line I've had a missfire problem that needed several long and involved phone calls to Tinleys to sort out, followed by a repair kit for the injector solenoids. - They were as helpful as could be and spares came next day by courier. Only thing I would say, it worked out pretty expensive, but ya gets what ya pays for, as they say.

Multi-point system and get it installed at a certified place, that way you have someone to go whinge at if it goes wrong and someone to sue if it blows up