Probably no remote will have all the functions of the original remote. There are just too many variations for different manufacturers and even different models for the same manufacturer. If you have the original remote you can learn what you need.
If you want a large touchscreen remote, the RM-AV2500/3000/3100 are good. I don't know enough about other brands to recommend any, but I'm sure there are other people who do and will be able to.
Here are some links for you to check out prices and features, and you can also check the reviews in this forum, just click on "Reviews" in the green box at the top of the screen.
http://www.surfremotecontrol.com/[Link: ecost.com][Link: remotecentral.com]http://www.aaxes.net/