“Best grip” is like “best food”: It depends on the person.
The OP is from Scotland and probably thinks haggis tastes lovely. So who knows what he wants in a grip’s feel? The texture of Highland thistle? 😉
As for eBay’s Squash Eric’s RKEP grips: There is a lot to choose from. Some tacky, some dry, some thick, some thin. The prices can’t be beat. So I would recommend ordering a mixed set and see what you like.
For fun colours, Kulergrip, of Malaysia has a rainbow of patterns. Good quality. Only slightly tacky.
Karakal and Kimony are also good quality brands with a variety of styles.
The world (of grips) is your oyster! Explore and have fun.