LogMeIn Free - Looking for suitable replacement

I need a replacement for my LogMeIn Free account (for which I was paying $450 per year). With a total of 75 "server" (viewed) computers, I can't justify the LogMeIn Pro cost.  My key requirements for a replacement:

Total number of "server" (viewed) computers  = 75.
Total number of "client" (viewer) computers that can launch remote sessions = 3 bare minimum (6 would be optimal)
Remote access to unattended server computers = Mandatory
Windows support for server (viewed) computers = Mandatory
OS X support for server (viewed) computers = Mandatory
NAT Passthrough (the ability to connect to the server behind a NAT without configuring the router's port forwarding rules) = Mandatory

I have a slew of extras requirements (non-installable EXE for servers, Android support, online meeting functionality with screensharing functionality on either client or server, deployment packages, remote reboot functionality...) but a product that lacks one of these extras is still a viable option.

I'm looking hard at two candidates: Splashtop and Mikogo. TeamViewer, like LogMeIn, is prohibitively expensive, Chrome Remote Desktop is reportedly too buggy, VNC, UltraVNC and Microsoft's Remote Desktop all require firewall configuration, which is not an option with the networks associated with some of my servers (viewed) computers.

Here's my question: Splashtop and Mikogo look promising. What other "diamond-in-the-rough" products are out there? With LogMeIn and TeamViewer taking the expensive route, I have to think there are companies out there who figure they can fill the less-expense market niche and still make money at it.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
A year and a half ago, I trialed ScreenConnect.  I decided to buy it 30 minutes into the trial.  Been VERY happy with it since. I renewed my license for continued updates at 20% my original cost back in November.  (a VERY reasonable number) and the product offers MANY great features and capabilities.

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Fred MarshallPrincipalCommented:
Have you look at Citrix products?  I'm using GoToAssist but only with one technician at a time - but lots of remotes...
jdanaAuthor Commented:
Lee W. - I'll take a serious look at ScreenConnect Thanks!
Fred - My personal experience with Citrix products: they make some superior products, but they can get pricey.

Lee W, MVPTechnology and Business Process AdvisorCommented:
ScreenConnect offers GoToAssist like functionality.
jdanaAuthor Commented:
I spent some serious time comparing the various products. In the end I chose Splashtop (for $60 a year, damn). It's a little flaky when I use my Mac as the viewer, but I'm generally happy. (Screenconnect was a close second.)
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