I have my 1600 overclocked to 1800 easily in my bios. It runs at 36c with a cheap quiet fan on it(80mm , 2700rpm antec). If the 1700 is just a tad more I would just get it and overclock it to a safe performance level of the 1900. I hardly notice anything faster, maybe big programs loading. I am not one to OC till they catch on fire but I do wanna OC it to a safe operating range since these processors will be out dated before there life span even runs out.
Hope this helps