Suggestions for modeling

[mikker_123]

I'm starting up on big project that will take much of my time in next year or two. Until now I was mostly self-employed on small projects so I didn't spent so much time modeling system before implementation. Sure, I wrote use cases now and then, draw UML in Visio but it wasn't matter of life and death. But because of scope in next project I'm kinda frighten that sooner or latter I along my team will get lost in poorly documentet envoirement where no one will know what is truly purpose of system's part that they are working on or how to connect it to another. So, since lot of envisioning and planning are up ahead I was thinking about sharing tought or two regarding UML modeling, drawing use case diagrams and similar subject. What programs for creating solution architecture you people recommend? I'm in need of something that can truly succesfuly reverse-engeenier and forward-engeneer (UML <-> C#.NET solution). What are your views on 2005 generation of tools (VS.NET 2005 with Visio 2005) that are comming next month? Anyone played long enough with Beta? Tnx!