The highest resolution of the Hitachi ED-X30 is XGA (1024x768). That's 23% less resolution than the most frequently found native projector resolution of WXGA (1280x800).
We think you might also be interested in different data projectors that have a resolution of XGA (1024x768) including the X122 (£417.76), or the X123 both from Acer which have a better Kagoo Rating™.
If you would prefer a projector with a higher resolution then you might want to also look at the Vivitek Qumi Q4 (£346.80) (WXGA (1280x800 and higher rated) and higher rated), the DELL S510 (£499.99) (WXGA (1280x800 and higher rated) and higher rated), or the [plb_2752124] (WXGA (1280x800 and higher rated) and higher rated).
What does "projector native resolution" mean?