Topo for Computer/GPS

Hi, I have the North Island Topo maps on computer, Memory Map and I'm looking to get the South Island too. Before I do I'm seeking opinions on the alternatives. I've been slightly disappointed with the Memory Map software:- - The maps seem well out of date, while there was a new version out a couple of months after I bought mine last year, the slight discount offered was not worthwhile as MM would not say which maps were updated and I wasn't bothered about the actual software improvements. - The quality between the individual sheets varies, with the actual shift between Topo maps being very obvious in colouring - it's as if they are good quality photocopies rather than produced from base data on PC. What are peoples opinions of the alternatives - MapToaster and Freshmap, the latter seem to have the advantage that the grid lines are available in the new NZTM co-ords (with the others if you want the new grids later this year, you'll need to buy their new map data again, and more dosh to lay out) though the detail does not seem as great with features - e.g. river names blocking out much of the detail (at least that's the way it appears on the web link http://www.freshmap.co.nz/products/nztm.htm are there any others? I've also got a new GPS Garmin 60csx and getting maps for this looks it's going to be a costly business too :-(