Hmm. Coming from and with a 20D, the 30D offers a lot for the money.
If a full frame sensor, which is demanding for some lenses and best used with the higher-end optics, is not a necessity, the 30D may do the trick. Or a 400D.
Nonetheless, the previous shots of the "USA-71" certainly do speak for the Pentax!
And your photo skills!
Warm regards,
Peter