Getting Pre-Approved

In gearing up for my first investment project, I am at the point where I would like to get pre-approved and funding in concrete before or while I start my serious search for an investment property. What I am trying to find out is what peoples suggestions are for getting pre-approved. I have great credit, cash for down partial cost, collateral and equity. I guess my question is, what type of credit should I be looking for (conventional bank/lender, lender through this site, particular unconventional loan?) Any suggestions where I should start in my search for pre-approved loans/credit?[ Edited by pghinvestor on Date 06/02/2005 ]