I don't think you can go wrong with any of the major brands these days, you don't here of any that fall to bits. It's down to finding a frame whose price and weight you like and seeing if the equipment the manufacturer specs is what you want. It is very rare that you hear of anyone regretting their choice, unless they have buggered up on the sizing or type of machine for the intended purpose.

Confusing, but great fun going through the options.