Here is a list of client features that are included in the clients post-Titanium:
http://www.eqemulator.net/wiki/wikka...ClientFeatures
HT and LoH have been changed to be AAs in SoD+ clients. They should be functional unless the server you are playing on does not have the proper AA info for them or recent enough source code.
All EQ download purchases on Steam are the same download, so I suggest buying whatever is the cheapest (probably UF atm).
SoD is all around the best client we have ATM, but UF has a few extra features and better memory usage (good for boxing) if you are able to copy over the missing files listed in the play guide on the Wiki here.