It's the old problem... :-( I think you've outlined the +/- pretty well. But if there's money or a business at stake, shopping based on price is not a good idea.
[Aside:] There was a very good OS/2 software store on the web before many other retailers knew what the Internet was. (It was around before Indelible Blue.) He started getting too popular for his existing software and decided to totally revamp his site to handle the load. It was a disaster - slow, too complicated, too difficult to search. I think his business died in less than a month. A web site has to be up and usable when people try to use it or people will go elsewhere with their money. [/Aside]
On the remote reboot side of things - there are lots of options. There's a lot of hardware out there that's Ethernet (or even telephone) based and can control the power to almost anything. That's probably the most bullet-proof solution. E.g. [link|http://www.remotepowerswitch.com/|Remote Power Switch] and [link|http://www.google.com/search?hl=en&safe=off&rlz=1B3GGGL_enUS219US219&q=remote+reboot+card&btnG=Search|these]. It looks like it would be $100-ish and up, depending on features, etc. I've got no experience with any of them, myself.
Good luck!
Cheers,
Scott.