Internet slows when using netgear firewall/router

I have 50/20 Comcast Business Class Internet service. When I test the internet speed at the Comcast gateway I get the expected 50 MB/s download speed. When I pass that connection through a Netgear ProSafe Firewall/Router the speed drops to 10 MB/s download speed.
I need the Netgear to isolate the gateway from my SBS 2008 server due to DHCP conflicts and to do specific port forwarding requirements.
Is there another firewall/router i should be using that will not choke off 75% of the Internet speed? Or better yet is there a setting I can apply to either the gateway or the firewall/router to address the problem?
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JohnBusiness Consultant (Owner)Commented:
I had exactly the same situation with a Cisco RV042 router that could not keep up with my ISP's faster speed. I had to upgrade the Cisco router to an RV042G (4 times the internal throughput) and now have a Cisco RV325 router (900 Mbits/sec throughput).

No doubt here the solution is a faster router.

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Kyle SantosQuality AssuranceCommented:
Is your router updated with the latest firmware?
llovingAuthor Commented:
Not sure of the firmware status of the existing router. Will check that.
JohnBusiness Consultant (Owner)Commented:
@lloving  - Thanks and I was happy to help.
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