Yeah. The 450G I've got is complete overkill for the job its doing. I'm using a whole 13MB out of the 256MB RAM it comes with and I don't use any of the RouterOS L5 features or even L4 features. The 750G is more than enough for this and if I was doing it again, I'd get one of those instead and save my £££.

The plain 750 should even be able to run a full speed FTTC line. It is only 10/100 on the ports though but it does support baby jumbo frames.