These days a 130mm x 180mm (5inches x 7inches) frame size is generally regarded as a must for anyone who wants to have access to a wide range of embroidery designs on the market.
One of the main reasons that embroiderers upgrade their machines is the desire for larger frames to be able to stitch off larger designs without re-hooping fabric.
The NV750 embroidery-only machine is fantastic value and is supplied with a 130mm x 180mm frame and larger re-positionable frame as standard.
If you require the machine to be used for general sewing as well the NV1250 is an NV750 but with a brilliant electronic sewing machine with lots of feet and very advanced features. The same frames are supplied as with the NV750.

Older machines that also enjoyed a 130mm x 180mm embroidery area were:
Super Galaxie 2000/2100, Super Ace + E, NV700E, NV700EII.