Personally I would never put a TR2 in any build. This list is not perfect but gives you a really good general idea of how bad it is.http://www.eggxpert.com/forums/thread/323050.aspx
While ko888 is correct ( as always ) that the TR2 is more than enough for your system you should pay attenton to his first post.
There's a reason why the Thermaltake TR2-600NL2NC can't get any 80 PLUS certification. Thermaltake specifies the efficiency as 72%+ and also this PSU doesn't have active PFC which is a requirement to get any 80 PLUS certification level.
It's based on an old obsolete design.
This is his way of telling you it's crap. Just because it's a higher wattage than the Antec just means you have more crap.
You would be fine adding a soundcard and overclocking with the Antec.