Another alternative using the enlarger you have is tri-color printing. With this you make successive exposures through a red, green and blue filter under the lens to accomplish color balancing. This way you do not print through a stack of filters and quality is better. You simply change the exposure time through each filter. Wratten #99, 98 and 29 will work well. One must avoid vibration of the enlarger head when changing filters to maintain sharpness, however. But a colorhead is highly recommended