at present hacked packages are very limited, so if you're already getting what's available, there is no need to upgrade, if not I can recommend the Dragon Cam, providing you have a card programmer capable of programming the loader card and your receiver is compatible.
T-Rex and Dragon are the same Cam, just a copyright issue over the name. The Dreambox will give you all the Dragon can, depending on the image you flash it with, it is a little more complex to use and comes in a variety of models, and prices. You might want to read through the Dreambox forum before deciding.
Have a look at the Dreambox forum, it has a huge (and world renowned) Idiots Guide which is essential reading for anyone contemplating a DB, it is a Linux box and can be programmed with different software (images) to achieve different results.
You really need to like tinkering with things to run a Dreambox, easier if you know your way around a PC and have experience with FTP etc.