Hey Chris,
Glad to see (or should I say "hear") you enjoying your new toy. Just a couple of thoughts.
First, you might want to check to see if you have the latest firmware version installed. Here is the link for downloads for your unit:
http://tascam.com/product/gt-r1/downloads/
You may find they've put in some useful additional features if it isn't up to date.
Next, you may want to explore the other recording formats to see if the quality is acceptable. The reason I say this is because I started using the highest quality .wav files until I forgot to download and clear some unimportant recordings. Then we had a great rehearsal, and everyone wanted a copy of the recording. When I went to stop the recorder, I saw the "card full" message and realized that it ran out of room part way through our session. Much disappointment. I have now gone to an .Mp3 format and can fit a lot more data on the card. It also takes a lot less time to transfer files, but that isn't as frustrating as the missed recording.
What I heard in your demo here sounded good.
Hydroman52