Range rover novice!!!

help! im new to the range rover scene and have recently bought a '97 p38 dse, i reserched alot of info before buying one and after owning mine for about 6 months now ive had nothing but trouble with the eas suspension, i knew they could be a problem but nothing like this!!! in 6 months ive only had it 9 days within any faults! Ive tried everything! So ive had to give in and going for a spring coil conversion.

What i would really like some help with is whats the best kit to go for?, im swaying towards an atlantic british kit, and another thing is with this kit will it sit high enough? Ive got 18" hurricane alloys on it and looking at the standard suspension kit, not the heavy duty one. Any help would be greatly appreciated.