im in the market for a preamp. now i cant afford an SVP-PRO or something that expensive. please list some preamps and what can be expected to cost for them. this will be matched with either a 4x10 ( then add a 1x15 in the summer ) or an 8x10 ( theres a used one for $700 here!!! ) with a carvin dcm1000. and to kill two birds with one stone ..... my next Q.... would you get an Ampeg 8x10 used for $700 *mint* or an Ampeg 4x10 for around $500-$600 and then add a 15" later?