"what I'm after is a little more soul and dynamics"
I recently had the opportunity to listen to a full Walker front end, TT/phono/stands/PLC/Validpoints, and it really struck me as an extremely dynamic and detailed system - able to jump at you with terrific dynamics. Cart used was the Air Tight PC1. Amps were the Karan pre/power monos, speakers Utopia Nova Be. Detail was amazing to say the least, and it wasn't lean at all for a full SS system.
My own system which I thought was dynamic, wasn't even close, so I got went to figure out what was happening and tweaked the footers on my preamp, at first trying out Nordost Pulsar Points Ti, which seemed to give me back the dynamics I was missing with the SolidTech Feet of Silence. I went one further and tried out the Walker Valid Points and this REALLY put a smile on my face. They remove micro vibrations which seem to rob the system of its resolution. The music became more immediate and much more dynamic - more "soul" if you like.
Like Jfrech, I too used an Esoteric front end, which is extremely good, lots of soul too, but it just isn't in the same league as my analog source.
What I would suggest is:
1) Try the Valid Points - these aren't an arm and a leg and are easily reversible if you don't like them.
2) If you really want the ultimate in dynamics, I would strongly suggest going for a high mass TT. I've heard SMEs (all of them), and as good as they are, they cannot produce the dynamics of say a Walker. To describe what I'm referring to, I mean like the hits of the tympani in an orchestra playing at FFF. This hits you with the initial transient and has deep bass that does not smear the rest of the music. There are plenty of high mass designs, the Galibier/RedPoint/Raven come to mind. For arm choices, I think you've already listed the best there are. Its more a case of matching with the cart/TT.
3) Get the Loricraft! This should have been on your list a looong time ago. I reckon this to be akin to a component upgrade.
4) If the above still doesn't cut it for you, then go for the Dyna XV1s or the AirTight. The former is a terrific soundstager with punchy bass and loads of detail, the later is in the speed king with lots of detail. Both have excellent dynamics.
Happy hunting...