Well, listen up. These guys are screwing you over. The PIX 520 will take some serious sh@t thrown at it. We are a financial institition. Securites dealers (stocks and bonds, etc). We have NASDAQ servers and many other financial servers and T1's coming into a PIX 520. Some SERIOUS dataflow. 25+ servers on the inside interface, 15 or so routers with T1's on the DMZ interface, 10 or so T1's and servers on the vendor interface and over 100 users CONSTANTLY using apps and surfing over the internet on the inside interface. The PIX 520 barely breaks a sweat. Is it an older model? Yes! But Cisco just gets better with age. Oh yeah, by the way, they are built like M1A1 Abrams TANKS. I have never had it or any of my routers break in over 6 years.
Find yourself some REAL network guys. They are trying to use excuses for their sorry @ss bandwidth problems and/or lack of network expertise. Where are you located? I can maybe help you find someone new. I am not soliciting business here. I am full time employed busy S.O.B. that couldnt take any side work if I wanted to. Nuff sed.
Small business owners like you are what drive the economy. Quit letting these losers suck you dry. The PIX is not so hard to understand using the PDM interface, but no doubt you WILL need to learn a bit about IP, TCP and ports.
Chuck