I've used the NavMan brand since I had it as an add-on to a Compaq iPaq and always liked the service provided. Although there are a lot more 'cool' things you can do with a Tom-Tom (e.g. add voice packs) I think the NavMan for looks, features and clarity has always done me proud.
I currently have a NavMan N20i, the entry model for the new 'NavPix' series. Came with full Europen road-level maps and two updates from NavMan which you can use for Speed Camera updates and things such like.