Frankly, if you have to ask then I would stick with VDJ until you are more comfortable..
If, however, you are comfortable with it (and confident you can use Serato to do a better job than you could with VDJ) then go for it 🙂
It’s really up to you – it depends on “used it lightly” really means – if lightly means you have messed around on it every now and again then I would suggest sticking with VDJ for now. If lightly means you have been practicing on it a few hours a week for the last couple of months and you are confident that you have imported your DJ database properly etc. then go for it 🙂
bob6397