Hellsbrink - I stand corrected, forgot about Compaq.
As for suppliers, I would add microdirect. It is greatly down to where you live, Dabs used to be on my doorstep until they relocated so now I think of MD. My present machine was bought from a local source but I later found that, despite them being a 20 min drive from me, I had to send it back by courier as they have no counter. I would suggest that if sourcing local phone them first to find out.
If cash is no object then definitely build your own, you will get what you want rather than an approximation.