Looks like SRAM is the only one who makes 10-speed grip shifters, and they are about $90 more than the shifters you're looking at, plus there would be a little bit more labor ... but wouldn't that be worth it for shifters that you don't have to worry about reaching? SRAM shifters are compatible with Shimano derailleurs AFAIK, my hybrid has 8-speed SRAM grip shifters and Shimano derailleurs.