I got my hands on a used G5438 Electromatic Pro Jet at my local music store. I was just curious, but once I started playing it, I was very impressed by not only the playability, but also the incredible tone. I would have purchased it that day, except that I did feel like my existing guitars covered the tonal area already.
What I am trying to point out is that if the Electromatic Pro Jet , which had a chambered basswood body was that good, then I would think that the G6128T Power Jet with a chambered mahagony body would be an excellent guitar.