I trained modular with a variety of providers and got RHS jet job within 2 months of completing training. The company I worked for had no preference at all for your training route. I would however agree with alot of the above posts that some employers would look for candidates who trained with as few providers as poss.
Best advice I could give is to dont stay with one provider to preserve continuity if you are unhappy with the standard of training. Its better to be well trained with a multitude of organisations, then badly trained with one.