Please help me select a vendor for Hobby manual mill

[m_c]

There are a few different factories, but the basic machines are all very similar. IIRC Seig, Syil, and Weiss all have their own factories, and produce for various people.

All you can really do is decide how much travel you really need (or can afford/fit in your workshop), then compare specs of the machines that meet those requirements. Personally I'd put more emphasis on the spindle than other features. If you're going big enough, try and get a BT/ISO spindle, as they are far more useable in a CNC context than MT/R8 spindles.
To get a good well adjusted machine, you're going to have to spend a bit time cleaning/tweaking/adjusting any of them anyway, so I wouldn't be swayed over any particular brand.