I'm looking to upgrade my shifters on my new cross bike that is on its way. I know NOTHING about Shimano, as I've always ridden Campy on my road bikes. I've been told by a friend that I will want to upgrade the Tiagra shifters, preferable to Ultegra. CX50 front derailleur and 105 in the back. Rear cassette is a 10-speed (11-30 according to specs) and front crankset is double 34/46. If anyone has shifters that they are wanting to sell and would work with this setup, please let me know. Thanks!!