I'm converting my downtube shifters to STI brifters. I run a compact double crank and a 10-speed cassette. For the same price, I can buy a Nashbar pair of STIs that weigh 90 grams less than a Shimano set of STIs. The Shimano is a 3x10 and the Nashbar is 2x10. Should I forget about being a brand snob and get the lighter Nashbar STIs, particularly considering that they are for my 2x10 setup and also get good reviews? How much hassle would it be using the Shimano 3x10 pair on a compact double crank? Please advise. Thanks.