I generally prefer twist shifters over triggers also. Try some Shimano Revoshift SL-RS45 or similar if you're interested in replacing them. I currently have these on my 750 and really like them. The RS45s have a softer "click" than some of the cheaper Revoshift models (like RS35). If you like the SRAM Gripshifts, you can buy newer versions of those, called the MRX Comp -- those are compatible with Shimano derailleurs.