I have both, and I'd rather have something break on the Classic any day of the week, by a longshot. Repairs on the P38 are often very difficult to find and when they are found the parts are ****** and don't cross-reference with anything.
The Classic on the other hand, has far less electronic gizmos to worry about, and very few things that cripple the vehicle when they fail. The P38, has a lot of things that when they go, leave you stranded until replacement.
Keep the Classic. It'll be less of a headache in the long run.
1973 Series III
1995 RRC LWB
2000 Discovery II
2000 Range Rover