R1 is decent but there are better iems for the money. As far as isolation - it's sub-par.You might wanna get something like mh1c (if you don't mind the horrible cable) or vsonic VSD1. Both are superior to R1. The mh1c is warmer and bassier than VSD1 but it's bass is on the slow side and the highs are a bit laid back but are not prone to sibilance. In comparison VSD1 is warm but closer to neutral and its bass is more controlled and punchier but less in quantity. Vsd1's treble is more pronounced and with more sparkle but as with other vsonic iems is a bit prone to sibilance. You can also check the vsonic VSD1S, which has less bass but its tighter and and has better impact. Check joker's thread for other suggestions - the SteelSeries Flux In-ear looks like it could be a pretty good choice too.