For most CNC work, 8-bit boards work just fine and are not a speed issue. There are exceptions. For example, if you plan on doing laser engraving, then you can engrave at a higher speed with a 32-bit board, but most router work is slow enough that a 32-bit board does not provide any benefit.
I have concerns about your router. It will work, but:
- We’ve seen longevity issues with off-brand routers.
- Having a collet for 1/8" and/or 3mm router bits is a great benefit. In your learning phase, you are likely to break or burn a number of bits, and 1/4" are often significantly more expensive. I don’t know what kind of collet this router uses, so it is unclear if there is a 1/8" solution.
- Runout (wobble of the bit), can be a problem with cheaper routers.
- Variable speed is nice but not critical. Many machines use the DW660, which is a fixed speed router.
As for the board, there is a hierarchy of potential difficulty in getting the Marlin firmware working.
- Boards that V1 sells
- Boards that V1 does not sell but does maintain untested Marlin firmware versions
- Boards that are rolled into the standard Marlin build, but are not referenced by V1
- Boards that use a snap-shot of Marlin, but are not rolled into the standard Marlin build.
The further down the list you go, the more likely you will need to put in significant amounts of time getting your board to work, though, based on forum posts, usually people do succeed. While it is an 8-bit board, V1 does maintain a version of Marlin for the Ramps 1.4 board using DRV8825 drivers.
