SVC has really improved on the color and brightness of their own lights; alas they seem not to carry the extra bulbs in single colors for 12" kits anymore.
I bought a 6" dual red kit as a flukey thing and liked it MUCH better than any 12 so far; I've been through so many little light combos my daughter just sighs and runs from my computer... I'd try that if you're saving money.
Just my 2cents here