PT 8 and Macbook w/ External LCD TV?

[Skyflash]

So who here is using an external LCD monitor/TV in their Macbook setup?
If so what is everyone using and how well is it working for you?

I want to expand my workspace and I'm thinking a 22 inch will do the job.
However I plan on doubling up and I want to use a TV with VGA input.
I understand you get a lower resolution with VGA monitors and I have yet
to find a TV that has a DVI connection.( that isn't so pricey!) So I could
live without the DVI option.

I would also plan on using it in expanded desktop mode so I could for
example, leave the main Edit or Mix window up on the 22 inch, and leave
the macbook display for open plugin windows.

Are there any major things I have to watch out for with this kind of setup?
FWIW I'm on a 2006 'Blackbook' CD 2.0 with 2 gig RAM, 10.5.7(I'm aware of the external HDMI issue in 10.5.7)