The difference between a PGDip and an MSc is the project/dissertation aspect, right? I'm not an expert but I suspect that it'll have little impact when coming to find a job. It could mean you are less competitive as a PhD applicant, though you say you aren't interested in it.
I know a few people who have done the same as you this year to be honest (taken their 120 credits and ran with it) so I have seen first hand that it's a relatively common route to take.
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