I saw a small (1 rackspace, I think) Peavey poweramp - I think 700W/side. I have been considering upgrading from the combo amp I've been using and maybe going with an SVP-Pro preamp and a lightweight poweramp. I'm thinking if I could get something like the Peavey, I would have one rockin rig with very minimal weight. I really don't need 700W/side though and I think 300-350W/side would work. Any ideas on other options? Are there downsides to buying the pre and power amps seperately as opposed to just buying one head? I am guessing the brand of the power amp doesn't affect the overall tone (please let me know if I'm wrong), so something small, light, reliable and relatively inexpensive would be awesome.