You could probably benefit more from having a better screen than upgrading your colour calibration kit. I can’t find anywhere the technology used in the screen but the 2ms gtg would suggest it is TN display. This combined with the low resolution doesn’t make for a good monitor for a photographer. A decent reasonably priced option is the Dell U2713H if you want a 27″, otherwise the 24″ version is a bit cheaper. Just make sure you can return the monitor as Dell has a very spotty QC. EIZO and NEC are the better known brands otherwise for photo work but with their better specs and warranty they are expensive. Having a consumer grade screen like your samsung is a good idea to see what the photo will look like on most people’s monitor but isn’t really up to it for colour critical work.