I'd give the edge to WH2O and I own (and love) TS. It's just one of those full package games that's hard for me to criticize too much. Cool theme, unique layout, beautiful, sounds great, etc.
You said price is a "slight factor", and TS wins all day if that's involved. WH2O is like $1000+ more than TS, and no way is it $1k more game on its looks and callouts IMO.
But seriously sell T2 and make room for both. T2 is hot garbage compared to two all time greats.