what is best - speed or stability?

[monitor]

I run my relay on a VPS with limited bandwidth, so have set it to 
hibernate every day after 1Gb usage.

When I set my RelayBandwithRate to 50kb, this means my relay is running 
for 12-16 hours per day.

If I set it to 25kb, it runs all day - and switching off hibernation 
becomes possible.

Which is the most useful option? Longer availability at a slower rate, 
or limited availability at a higher rate?

Thanks in advance,

Dave