I've only been in the saltwater side for about 6 months with my Evo. So everything I know is what I got from forums and a short time of experience.
1. I stuck with the Sicce 0.5, VCA RFG, and a Jabeo Wavemaker. I think the 1.0 would be efficient for your needs as you can turn the flow down. The reason I did the 0.5 and wavemaker was to get more flow all over the tank with my large rockscape. I didnt want too much flow in the small "channels" the flow goes and dead spots.
2. The lighting is ok, its simple and doesn't make anything look well, I definitetly got good algae growth. If using a timer, there's no ramping and you have to press the touch button for Blue only mode. I tried modding it and got ok results but I pulled the trigger on a Prime HD last week and its a no brainer how much better my tank looks and corals color up and grow.
3. I don't have any experience with the IM 14 but I like my Evo a lot. I got it for 50% off at my LFS for black friday. IMO they are the same tank just different dimensions. I guess it depends on which one offers more aftermarket equipment to suit your needs.
4. You can check my build but the things I added from stock was, Intank Chamber 1 with Intank Floss pads and Chemipure. A bag of Seachem Matrix in chamber 2 that I had left over from my FW tank just to add more surface space for bacteria and etc. It wasn't needed but I felt it was wierd to have nothing there. Then a Cobalt Aquatis 75w Nano heater, Sicce 0.5 pump, and VCA RFG in chamber 3. I have the smallest Jabeo Wavemaker on the lowest setting to get more flow in places that doesnt get any but thats because of my large rockscape. I just upgraded the lighting to the Prime HD made my own screen with a window screen frame kit and bird netting I got from the local hardware store. It cost me $13. Besides a timer for the wavermaker and a power strip with individually switched outlets, that's about all I did.