I personally hate THUG, I bought it played it once and haven't come back. It really sucks. I like the old TH games better. THUG is just plan bad and not fun.
Get FFX-2 and just wait for THUG2. It comes out in a month or 2. The other day I was gonna GGC THUG but I saw Super Monkey Ball 2 so I got that for $15 instead. I'd say get FFX-2 now anyway cause thats the cheapest you may get it for awhile and THUG is gonna stay $20.