Don't have loppers myself but when my dad was complaining about the state of my hedge cutter things, I sent him off with some money and he came back with a pair of Fiskars because he rates them as a good brand (and they are brilliant compared with the others!). So now I'll be buying Fiskars for all sorts.
I also have a pruning saw from Silky Fox which was really expensive but is just amazing. I think they do loppers as well which I imagine are great.
H