I have had my 751s for about a few weeks now and I hate the stock tips. I have to constantly wiggle them trying to get a good seal. Can you guys recommend me some tips. I heard complys are good but do they last? Thanks.

Hi, I am looking to upgrade my jvc marshmallows for a something that sounds less muddy but with good base and better sound quality. I have narrowed it down to these 2, the C751 or the UM1. First of all, will I notice a good difference in SQ after listening to my marshmallows? Is a a good jump...