As much as we love CRTs, they're not easy to store or maintain. As a result many have turned to modern TVs to play their retro systems, only to find that the image quality isn't to their liking or their TVs don't have suitable inputs for their classic systems. This is where upscalers like the Open Source Scan Converter, Framemeister and RetroTink come in handy and all have their own strengths and weaknesses. The latest offering is Mike Chi's RetroTink 4K and it's easily the most impressive upscaler yet, but that quality certainly isn't cheap.

Clocking in at an eye-watering $750 (that's before postage and custom charges) the RetroTink 4K is a premium product that won't be for everyone. If you can justify the cost of entry, you'll most likely never need another upscaler, because this is a mind-blowing follow-up to the superb RetroTink-5X. Thanks to an exhaustive amount of testing from within the community, the RetroTink 4K is an exceptional piece of kit and should only get better with time as more updates and profiles are released.

In addition to all the 5X's inputs (component, scart, composite and S-Video) the 4K also includes HD15/VGA and HDMI 2.0, meaning it will play a staggering number of systems. We're particularly impressed with the HDMI output as it now means 720p PS3 and Xbox 360 games look absolutely fantastic when upscaled (just be aware you'll need a HDCP stripper to play the PS3 this way).

The system itself is a joy to navigate thanks to a much cleaner interface than the...