A320 rating.....
Having graduated from an integrated course myself and subsequently worked in Flight Deck Recruitment I say well done on taking the bull by the horns and securing yourself a rating with 300 hours to complement it. As with any investment, business or otherwise, there is an element of risk involved however, I placed people with various airlines who had opted for the same route as you had with only 150 hours on type.
The A320 is the rating of choice and having sat with my finger on the recruitment pulse for a year I would fancy your chances of gainful employment post 300 hour completion as extremely good. Well done, and good luck.