I was also looking for an IR extender and I got one from CTG
two days back.
It works as advertised, but it has issues in my environment. I have a large screen plasma TV and it interferes with the IR receiver. You will need to be careful due to your plasma TV. I think the interference will be more with the larger screen.
I am planning to try extender from Logitech
provided I get positive feedback regarding my issue.
These too are on my list...
Hot Link Pro
Let us know how your search proceeds and your experience with an extender that you decide on.