The Aspire E3 has a better processor family than most portable PCs that have been available for more than a year. This notebook PC has an Intel Celeron processor family, whereas most portable PCs of this spec and age have an Intel Core i7 processor family.
This notebook PC's processor family (Intel Celeron) is actually the worst processor family across all many processor core laptops that are a similar age to the Aspire E3.
Across similar types of notebook PC the best processor family is Intel Core i7-4xxx.
If the processor family of this notebook PC is not good enough for you then you might want to consider the Toshiba Satellite C55-B (£629.55) (Intel Pentium).