Auggy:
Welcome aboard.
The controllers RJ has designed all do dimming as well as on-and-off. Ramping up lights slowly or fast and then ramping them down can make for cool effects. The quality of the effects is often dependent more upon the software (Vixen, LSP, Prancer, whatever) than it is on the hardware.
Into the mix you have to determine the topography of your yard and decide exactly what philosophy you're going to follow. Some people prefer a centralized approach, where they keep all the controllers and SSRs (solid-state relays) in the house or garage and use long extension cords to distribute electricity to the lights, while other people distribute the controllers and/or SSRs around the yard, with shorter extension cords.
Pretty much whichever direction you go, you're soon going to own a lot more extension cords.
The difference between a Freestyle and an Express is the difference between discrete and integrated hardware.
The Freestyle is designed to allow you place your SSRs in a distributed manner around your yard, with the Freestyle centrally controlling the individual SSRs. It supports 128 channels and most SSRs handle four channels, so a typical Freestyle installation would have 32 SSRs -- so you have to have the controller and the SSRs, each discrete devices. It wouldn't be a generalization to say that a Freestyle installation would use lots of Cat5 cable and fewer extension cords.
The Express is an integrated device, with the SSRs built into the controller board. To achieve that same 128-channels, you'd need 16 Expresses. You would distribute the Expresses around your yard, close to the light or lights it was driving. An Express installation could be typified as one that uses less Cat5 cable and more extension cords.
I initially adopted a mix of discrete and integrated devices and found that the discrete devices had a number of potential points of failure -- the controller could be bad, the Cat5 between the controller and the SSR could be bad or the SSR itself could be bad. My first year I experienced all those problems and between Years One and Two I eliminated my discrete devices and concentrated on integrated devices.
While I have had problems with the integrated devices, the solution -- swap out the bad controller with a spare -- makes the ease of in-the-dark, mid-show troubleshooting well worth the cost of the change.
I think I've answered your questions; I hope this helps.
\dmc