I am getting amazon giftcards for a research study I'm participating in and want to buy a nice digital recorder with them. I would like it to be pretty durable and preferabley use sd cards so that if I theoretically run out of space when I'm out somewhere, I can just put in a new card instead of needing to plug it in to the computer. My budget is around $100, but if 1 is a little more but has something awesome in it, that's cool too. I just wanted to leave some extra money if I wanted to get a mic. I have also read of some that have simulated x and y axis recording because of how the mics are placed, but the one I read about I guess didn't feel or look very durable, and got lower reviews than some of the cheaper ones. any suggestions would be appreciated.