hope i can help, i have the road angel navigator 6000 and i find it very good. the navigation is good as long as you enter a street name aswell as a postcode otherwise it will not take u strait to the door.
The speed camera bit is really good you can have it on its own without the navigation as i full screen camera detecter or when you are using the naviagtion it does kick in when it finds a speed camera. Its also very acurate aswell it suprised me how accurate it is.
Mine come with 6 months free updates, thats all the subscription is for is the updates so if u dont want to update it then it will cost nothing to run but it about £6 a month or whatever it is, is nothing anyway.
Overall i would recommend it but i have never used tom tom so i cant comment on them, the only thing i would say about it is it can be a bit slow (the software is microsoft run!) where as a Sony NAV-U50 i have used was quick.
Any questions give us a shout
Glen