Time for a new router?

[#1]

I've just re-negotiated my package with PlusNet. They've offered me a new router for a delivery charge.
My existing router is a Thompson which was provided when I joined in 2010.
I have no problems with this router but would a new one be faster, have better wireless range and be more energy efficient? (It gets very warm) Or, should I just stick with my existing router?
Thanks

[#2]

faster - no
better wireless range - possibly worse
more energy efficient - I have no idea

[#3]

Supposedly faster wi-fi but, as Jim says some people find the range poor.
For the price of delivery it might be worth paying just to have a spare in case you ever need one.