Have you made your choice yet Ron? The ATPro is a go anywhere with average to good performance and is not bound by sunshine or rain - it's display is just a bit on the small side for me - but that is personal. I also have the F5 which is not waterproof at all but you can adjust almost any performance spec on it - great for experimenting and it has a nice big display - price is very good from Wolfgang. Also have a look at the Turkish Makro Racer - also sold by Wolfgang.