I repainted two VWs a few years ago in a garage. A 66 Bettle and a 66 Bus. I used single stage on both. It worked well except for the Beetle. I sprayed the front fenders when it was raining outside. developed little blisters six months later. My current CJ7 project will be painted with OD Green AJP single stage from Gillespie Coatings.
Nice!! I still can't decide on a color..... When you can pick any color you want, it's almost overwhelming. As far as your decal dilema - I feel your pain. Looks very nice "nekid", but the decal kit would look sharp too. If it was 50 or 60 bucks, it would easy to get it and try it. 300 bucks - man, that's a lotta dough to waste if you don't like it.
I hear you on the color selection. What drove my decision was that my dash was still in great shape, and it all works, so I chose not to tear it apart. Consequently, I stuck with the original AMC Olymipic white.
My two cents. As long as it's the same color, put the decals back on it. My 83 is also white with the blue decal package and I personally love the combo. When I finally repaint, the only way I lose the decals is if I go with a different color. I think the decals make that white pop.