MBP 15" , Lion, 24" External Monitor Woe

Hi
I am now running Lion and as many other people, i've noticed my fans are alot noisier now. I use my MBP with the lid closed when at my desk with bluetooth keyboard and mouse and via an external monitor. I've found that i get full 1920 x 1200 res when the lid is closed but when i open the lid (fans going nuts when streaming video and i want to cool her down) it looks like the graphics card cant handle both displays and the monitor resolution drops substantially.
I have also noticed poor wifi performance with the lid closed.
So i was just wondering what other people are doing, i guess the easiest thing is too open the MBP to keep her cool and improve wifi, and then put a magnet on the MBP to "trick" it into thinking the lid is closed which should give me the full resolution for the external display. Its shocking if this is the route i have to take for a £1500 laptop.
Not the most elegant of solutions so please let me know if there are others, its funny, i was 100% happy with Snow Leopard, and now all these little issues seem to be popping up. I guess the poor wifi has always been there but i never noticed it.
Please can someone pass down some experienced advice.
Thanks
Pete

ttt

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http://www.apple.com/feedback/macosx.html
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See below:
GRAPHICS
Graphics Card
Intel Iris 5100
Graphics Memory
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Display Connection
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Display Support
Supports an HDMI-compatible device, including 4K, while using one Thunderbolt display or support for two Thunderbolt displays
Display Modes
Dual display extended, video mirroring, and AirPlay Mirroring
External Resolution
Up to 2560 by 1600 pixels (Thunderbolt) Up to 3840 by 2160 pixels at 30Hz or 4096 by 2160 pixels at 24Hz (HDMI)

Dual External Monitor Solution

Hello,
I currently have a late-2011 MBP, which only has one Thunderbolt port for an external monitor.
I am used to using two external monitors for my workflow on my Linux machine, and would like to be able to continue to do the same thing with a MBP.
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Addendum: For reference, these are the external monitors I am using: http://www.amazon.com/gp/product/B008A3KFB8/ref=oh_details_o04_s00_i00?ie=UTF8&p sc=1

http://eshop.macsales.com/search/NWTVIDU
The worst lag problems occur when you try to use a Mouse on these screens. The feedback is slow and will drive you nuts.

MBP 15" , Lion, 24" External Monitor Woe

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