The first thing you need to know is what size/shape/wattage and type of base is in there now.
That will eliminate many of the choices you have found.
With LEDs you might need to decide the color/temperature range you want as well.
I have been replacing my bulbs with LEDs and have bought all of them on Amazon, but check for reviews as some are not rated well.
http://www.amazon.com/s/ref=nb_sb_ss_c_ ... aps%2C1089
The technology is changing daily and the prices are all over the place.
Some bulbs are much more directional and others are more like a normal bulb.
Fitment can be a problem, the bulbs I bought for my license plate light were too long and the ones I bought for my third/high mounted brake light were too big in diameter to fit into the hole so I had to get different ones.
The dome light bulbs I bought to replace the Ford bulbs are very blue and had to be rotated until they were aimed to the best light. I also added three round LED ceiling lights (maybe the same as you CCV ones?) that are more white/yellow.
Both are fine at night but neither one has as much fill as a regular bulb in the early evening hours or on rainy days.
Since those lights are a camping type light you might check some rv camping sites.