Need a sat nav - which one

[P Nuts]

right so I currently have a navman s30 3d, have so for about 5 years, but its really starting to get outdated, and the battery is starting to slip, its about £20 to get it updated, but I think what with the technology evolving on them that money is better sited to put towards a new one. It will be used for day trips out (UK) and picking thing up on ebay. the main problem I seem to get is if I avoid motorways, I end up down dusty backways that aren't suitable.

so ideally id like a fairly decent one, budget about £80, as I said its not for work or anything so uust enough to take a minimal amount of stress out my journey. I particulary interested by the 'lane guidance' display.

ive got a few in mind:
Mio 419LM
and a few of the garmin range

so whats a good bet?

[rog007]

iPhone user? If so; Navigon is good.