Where best to mount a GPS?

[2wheels]

I can also recommend buybits.com. They have a bewildering array of mounts and cases and leads at reasonable prices. I have one for my iphone which including plug in lead, iphone plug and handlebar mount cost about £40 and was delivered next day. All nicely sealed against the rain. Only concern is security but phone is easily removed in a few seconds. Worked well on a 1000ml trip up to Scotland!