Yes, indoor will be the tough part. I'd suggest saving a bit more and going for the S5 IS or the G9, both of which will let you add an external flash later on. If you can't wait, you can get external slave flash units that will be tripped by the camera's flash going off, but exposure will be tougher to manage. Next step below the S5 or G9 would be the A650IS IMO. Pretty much everything the S5 or G9 has except an external flash shoe and it doesn't have as much zoom. Like the S5, it runs on AA cells (get rechargeables for general use, but in a pinch you can buy some disposable ones).