Which Powerblocks to Choose


I saw that amazon is having a sale on powerblock dumbells right now, and I'd really like to get a pair, but I'm not sure which to choose. The personal trainer (at $240) and the classic (at $260) are on sale, and the elite is at it's normal price of $300. I'm wondering how heavy I'm going to want to lift in the future, because if I do ever want to expand the weights to 90lbs, only the elite does that. The classic can go up to 70, and the personal trainer stops at 50. As a 105lb, 5'3" woman who currently squats with 30 in fitnessblender workouts, will I ever need more than 50 lbs for fb workouts, and at that point, should I just join a gym? What does the community think?