Considering you would have to use an old (=<4983) X2 bios, here's really no advantage to changing your softmod from EvoX M8 -> X2. The new X2 50xx series is not available in BFM (Boot From Media) format, so unless you can figure a way to do that on your own you're up a creek. In any event, the only reason I see for wanting to switch to X2 is the Xbox Live blocking, and if you're running the "metoo" version of M8 already (this is packaged with a lot of exploits) you already have it. It's not worth screwing your softmod up and having to redo it.