I highly recommend Safety 1st seat that spoons your own toilet lid. Here's a website to check out: http://kidsstuff.stores.yahoo.net/b151-trainer.html
I purchased mine at Meijers, but Meijers no longer sells them.
The reasons I love it is because you don't have the clutter, it's easy for both kids and adults to use (the adults simply lift the kid seat up when they have to use it). It's the perfect size for kids.
We also use a step stool (purchased at IKEA) so that the kids can easy hop on the toliet.
If you go with a stand alone potty chair, you will have a mess to clean up and then will have to retrain your daughter to use the toilet, so why not just train her to go on the toilet the first time around?
It was also suggested I let my daughter watch "It's Potty Time". That didn't work at all, in fact, that video is very old and very annoying.
We ended up using mini M&Ms as an award. Each time she went potty, we'd give her 2 M&Ms.
You will also have to tell her it's time to go every 1/2 hour. Otherwise she'll have lots of accidents.
Give her time and make a huge deal when she does go. You can also try stickers if she's not into M&Ms. Oh yeah and one last tip, place her on the toilet the second she wakes up. We also have bathroom books for the kids (that seemed to help too). Target has a 2 step step-stool with a hide-away compartment where we placed small board books. Both my kids got to pick which books they wanted when they were on the pot.