I love the stingray on my wifes 5.5gal
Might wanna go with 2 eventually for higher light plants or if they will be more than 12" from substrate. I only keep anubias with mine so its kind of overkill. Also, if going with the stingray, id look into a rgb led bulb/socket if you want a night view or just get a fugeray. The Stingray only has one button. On/off, no blue only.
Looks fantastic btw. Very impressive!