Best value strings for a practice instrument? Dominant / Vision / Tonica compared

Tried three sets on the same instrument; subjective notes:

· Dominant: fast response, bright, good for ensemble, but the top end loosens after two weeks.
· Vision: higher tension, focused sound, lovely for Bach solo, a bit heavy under the fingers.
· Tonica: warm and soft, comfortable for long practice, but lower volume.

My instrument is on the dark side; I kept Dominant with a gold E. Please add your own combinations.