I have been offered these items for a very low total cost of £825, and it is an all or nothing deal. Trace Elliott GP12 valve blend pre-amp, Mackie 1400W power-amp, full flightcase, Mesa Boogie 2x15 shockmount, & Trace 4x10. Familiar with all the items except the Mackie 1400w power amp. Can anyone advise on the quality of these Mackie amps and how they compare with say, Ashdown, Ampeg or Mesa for sound? Almost seems to good to be true, but the guy wants a very quick sale. Thanks, Spike.