Tab top are the easiest to hang and launder.
Jc Penny is a good store to start with, they are always well stocked and do quick special orders.
Measure your windows from both the inside and outside frame and grab youself a sales clerk. Go on a Tuesday .. when they are all bored half to death. If you really can't decide, check your local yellow pages, decorators aren't that expesive, when you are looking for window treatments.