I do not have experience with DevExpress products, so I do not know which license i should take.
My first thought obviously was not going for some of their components, as this is not really interesting for 'personal' use.
So one of their Visual Studio® Productivity Tools looks interesting. But which one is the most interesting?
What do you guys think?
I'd go for .NET control packs. Winforms or ASP.NET, or both, if possible. They were pretty good, a vast improvement over the default ones that .NET has built in.
I'd opt for CodeRush + Refactor, a great set of tools to help your productivity.
If you are already using a productivity addin, I'd go for the .NET control packs - DevExpress have done an amazing job redesigning a lot of the standard functionality that .NET brings with its controls, and it's well worth the download.
If you aren't already using a productivity addin (CodeRush or ReSharper seem to be the main contenders) - I'd go for CodeRush + Refactor - an excellent set of productivity tools that seriously improve your coding speed.
I find CodeRush (Express) to be useful to a point but doesn't really improve my development process. I watched a few videos on adjusting your workflow to suit CodeRush but didn't feel the time investment was justified, especially given the non-transferable nature of most of the changes and the amount of work I do outside of Visual Studio. Refactor was pretty much useless for me.
If you have a bit of time to kill, you might want to check out this site: http://www.devexpress.com/Products/Visual_Studio_Add-in/Coding_Assistance/training.xml There is certainly a lot of things CodeRush/Refactor can help with and usefulness will vary with each person's particular needs. Weigh up how useful the particular features are. If even a small handful of them seem likely to save you a lot of time, go for it. I'd heavily lean towards getting a component suite instead though.
[edit] Remember there are free trials and express versions you can use to help decide if it's worth going with them as well.