I use the Philips Norelco Bodygroom 7100 - Chrome.
Its technically "for men", so if you want one that is "for women" I guess it isn't the best option, but I LOVE my 7100! I use it for everything from my armpits to my knees (I use a single blade for shaving my face and a Schick Hydro Silk from the knee down). The main reason I got a body groomer is that my thighs never got used to being shaved and I always end up with really bad razor burn. The 7100 has a shaver on one end and a beard trimmer on the other, but I just popped the guide/guard off the beard trimmer and use it to trim when I go too long between shaving. It take a little bit of time to shave my thighs with it, but it works very well. I end up having stubble a day or two later, but since I can sit on my couch and watch tv while using it, it doesn't bother me too much, usually. I'd recommend at least looking into it. It costs about $70 at Target but well worth it if you ask me.
Hope this helps.