I have planed to build a layout this summer, and I want to go DCC from the start, but I'm not very sure what system choose. 
After doing a lot of research, I have ended with 3 candidates: ROCO DCC system; LENZ Digital Plus (Set 02-04), and DIGITRAX (Set Empire Builder II).
-The ROCO system is the cheapest and a good basic system for starting (internally, a LENZ system adapted), but I'm afraid that, in the long run, it will be some limited.
-The LENZ is a good system with an acceptable price, it can be connected to an computer and it have lots of accesories but, when you start to expand it, they came with a high tag (and I dont like very much the throttles).
-Finally, the DIGITRAX seems a winner for me (it have lots of accesories; it can be connected to an computer, and I love the throttles), but it's the more expensive and I feel that it can be a case of 'too much, too early'
I know that, in theory, these systems are more or less compatible, but I prefer do not mix other elements than decoders.
So, I will thank any hint or opinion that you can give me about. Are there any people that have worked with one of this systems? Do you feel that the Digitrax extra features worth to spend early the extra $$$? (I can't afford to purchase one system now and to jump to another later, so I will be 'sticked' to the one that I choose at first)
Thanks

After doing a lot of research, I have ended with 3 candidates: ROCO DCC system; LENZ Digital Plus (Set 02-04), and DIGITRAX (Set Empire Builder II).
-The ROCO system is the cheapest and a good basic system for starting (internally, a LENZ system adapted), but I'm afraid that, in the long run, it will be some limited.
-The LENZ is a good system with an acceptable price, it can be connected to an computer and it have lots of accesories but, when you start to expand it, they came with a high tag (and I dont like very much the throttles).
-Finally, the DIGITRAX seems a winner for me (it have lots of accesories; it can be connected to an computer, and I love the throttles), but it's the more expensive and I feel that it can be a case of 'too much, too early'

I know that, in theory, these systems are more or less compatible, but I prefer do not mix other elements than decoders.
So, I will thank any hint or opinion that you can give me about. Are there any people that have worked with one of this systems? Do you feel that the Digitrax extra features worth to spend early the extra $$$? (I can't afford to purchase one system now and to jump to another later, so I will be 'sticked' to the one that I choose at first)
Thanks