Biocube diy led questions

[btuck887]

i wanting to do a led upgrade on my 29 biocube. i was considering the diy retro dimmable kit with 20 leds. but im thinking i would like to do a few more leds..

what are some reccomendations?
do a diy with say 24-36 leds?
opinions on color combos, such as how many CW, RB, NW, B, etc..
really want to do a nice led upgrade and not have to upgrade that again in the near future

Thanks in advance