Turntable upgrade recommendations: SME vs AMG vs Technics vs other

I've recently upgraded most of my system, but I still have a Rega P8, with Linn Krystal cartridge, which I like, but I've heard that there may be better options.

I have Sound Lab electrostatic speakers, Ypsilon Hyperior amplifiers, an Ypsilon PST-100 Mk2 pre-amplifier, and am thinking about an Ypsilon phono stage to match with my system, and a turntable/cartridge.  I listen to almost entirely classical, acoustic music. 

Based on my very limited knowledge, and simple research, I've been looking at three brands, each of which is a different type of turntable: SME (suspension), AMG (mass), and Technics (direct drive).  
What are the advantages and disadvantages of the different types of turntables, and of those in particular?

Thanks.