Which Lenovo laptop? Do you means the Flex 2 for around $525 - $550? The A8-6410 is an ok APU. The processing power is basically similar to a low end Core i3 CPU and the Radeon R5 (Beema) GPU core is almost equal to the Intel HD 4200.
I recommend the Lenovo ThinkPad E555 for $455. It comes with the A6-7000 APU, but I recommend upgrading it to the A8-7100 APU with the Radeon R5 (Kaveri) graphics core which brings the price to $483. The A8-7100 processing power is about the same as a moderate Core i3 CPU and the graphics core is about equal to the Intel HD 4600 which gives a pretty good performance increase over the Intel HD 4200 and Radeon R5 (Beema); probably around 25% - 30%. Upgrading to the A10-7300 will bump up the price to $636...