Not sure where the best place to purchase for the best price, but these are certainly pricey. I doubt you'll find a 17"+ console with KVM for less than $800 (again, this may be well within your price range, but you didn't mention a price). Also, I've personally never seen console units with less than 8 port KVMs.
I've personally used Belkin console units and KVMs, and they work very well. The older PRO2s are a little funky when using the USB portion of it, but other than that, no issues to speak of.