Ive been looking to buy a gps for awhile and have narrowed it down to the 450 or 550. I can get them for the same price and understand the camera is the only difference. I was wondering about the 450 or 550 vs. the 450t or 550t. is it majorly worth having the t models? im using it for hunting and camping. if anyone can give me a little of there 2 cents or opinions on these models or others that would be really appreciated!