Her tits look GREAT just the way they are.
I've played with store bought tits before, and have always prefered the way a real tit responds and feels. Yes, they look nice when a woman gets them enlarged but there's always a chance the quack could do a bad boob job. I've seen jobs where her nipples point North and South afterwards.
This advise is coming from a man who's been going to nudist resorts for over 20 years and has seen more than my share of big tits.

OK..... that was my 2 cents.
Have fun and please do post some photo's of her new tits!
Cuck who loves a creampie.