It depends on what you want while no android ROM is ready for daily use.
If you want just to run Android and keep your WM intact, you might go to a FAT32/ext2/ext3(w/ or w/o CWM). No hardly modifications needed.
If you plan not to use intensively your X1 (and MOSTLY if you have a backup device or other device as your main phone) you can go for a NAND ROM(wipe all your data and test it) but there are several bugs so be careful. Harder to install and restoring original settings.
You have all instructions you need on the forum. Btw welcome in our comunity and happy androiding. If you have any other questions just ask me via PM