Regarding sizes, better check with the geometry. My size S is toptube effective 54.5, so biger than a 54 (size M) for a classic. I recomend you the velogicfit site that calculates X,Y values, where you actually place your hands on the handlebar. The Merida Team SL cockpit has a -7 degrees slope and the max spacers you can put are 25mm. You enter these values along with the size you choose and it gives you the exact coordinates of your hands on the handlebar. Enter also your current bike data so you can see where you sit today and play with the new bike’s options (size and stem length) to check how close you will be. As far as the frame alone it comes with lots of goodies, such as a Shimano and a Sram bottom bracket included.