vps servers
I have experimented with quite a few vps (virtual private server) systems. My typical setup is pretty simple. I use my server mostly for a mail server and for simple web pages. The main load is heavy spam filtering which taxes a small vps. One solution is to use your vps only as a mail/web server and do the anti-virus (clamav) and spam filtering at your local lever (with another linux server). This works well using fetchmail to pull mail from the vps server.
The various vps venders I have tried seem to provide varying levels of support and hardware. The competition is very high right now so you should be able to get a very fast system with decent bandwidth (300-500 gb/mo) for not too much money.
More to follow.