300 gal Borneo Biotope, need suggestions

[Pilze]

In two weeks I am picking up a used acrylic 300gal(96"x24"x31") from the shop. I'm transferring over stock from my 75gal. Need some help picking out stock.

Stock

12 Clown Loaches; 2 6", 1 4", 4 3", 5 2"
+8-10 new 2" Clown Loaches
15 Scissortail Rasbora
5 Bala Sharks
5 Tinfoil Barbs

Since I'm joining the monster tank club, I thought I should get some monster fish. Besides the loaches, the stocking list is really lacking color(red, silver, and black). Any suggestions?

Filtration

2x Rena XP2 w/ charcoal, filterfloss, and scrubbies
2x Koralia 4
1x Magdrive 9.5 w/
75gal sump & turf scrubber

Plants
Submerged
C. wendtii; red and green, potted
C. balansae, potted
N. zenkeri; green, potted
Surrounding
Scheflerra
C. arabica, nonnative

Lighting
12x 29w CFL Flourescents, 5500k

Heating 80F
2x SmartHeater300
1x Hydor400 (sump)

 

[Muske]

Need more silver?

Rainbows come in a few colors, unsure if they fit the bio-type bill though.

Watch the crypts, my loaches love to eat them. It is good and bad. They don't really eat any new growth, but instead take down the leaves as they get 5-6" long. I didn't expect them to thrive, and really put them in there more as experiment if anything.