The arm and cartridge are a pair, that needs to be considered together. The arm you choose, will dictate the types of cartridges that you can use with it. You cannot just slap any cartridge onto any arm.
I have always preferred gimbal-bearing arms, and will continue to use them. I like heavier, low compliance cartridges, and gimbal-bearing arms of proper weight and bearing quality are a better choice for these kind of cartridges(IMO). If you prefer higher compliance cartridges, then a unipivot may be a fine choice. In general, a unipivot will give very liquid midranges, but suffer somewhat in the bass, in comparison to gimbal bearing arms. Gimbal bearing arms may not be quite as liquid in the mids, but provide a rock solid bass response. Assuming good design, of course. Some of the very best arms can overcome many of the traditional shortcomings of their respective designs, such as Graham 2.2 unipivot having decent bass, and Origin Live gimbal-bearing having quite liquid midrange. Nothing is perfect, and you have to select what will fill your needs the best. But cartridge range and arm type should be considered together.
