I give a lot of thought for this, and I think if you want to spend less money, and get 1500 VP, then you could buy 15 T-credits (not pack, but 1 T-credit - 15 pcs). That will cost you $28.35, and you could have 1530 VP per month.
But 125 T-credits pack is much more cheapper, because every T-credit cost only 29 cents! So anyway 125 TCredits pack is best solution.
