Going with retro fit for the fixtures might be the best bet. They will save space so the light will go where you want it to and not outside the tank. The reflectors have a bit of angle adjustment too.
With the bulbs it depends on what you're looking to get out of them, ascetics or growth. For growth go with all Blue+ or 2 B+ in the back and 1 B+ & 1 Purple+ in the front.
https://www.atinorthamerica.com/faq.php