yeah the GP12 there looks ok.
there is another BCer here who's selling his trace elliot 4x10 combo, good price. worth investigating, its in the amps and cabs for sale section...
i've got a 300w GP12SMX 4x10 combo + 300w GP7SM 1x15 combo
the 1x15 covers the low end of the spectrum and the 4x10+hf covers the mid range honk and high end. sounds fat and albeit heavy!!
gotta love the trace elliot stuff, built like tanks!
on a different thought...all of my gear is built like tank...boss pedals/trace elliot amps...apart from my bass which is cheap and cheerful. i guess if that broke, i could always just buy another cheap one...(im not one for really expensive guitars...)
have a look around on ebaygumtree and here as well, some real good quality stuff to be had at great prices!!