My A161s are on the way. FWIW, I'm very happy with the value I get from the A151s...a good all-rounder for $30. Based on ljokerl's review (excerpts below), I'm expecting a step up in the experience for almost the same price I paid for the A151s.
(2B10) Fischer Audio SBA-03 / MEElectronics A161P
The SBA-03 is an impressive all-around performer, not just ‘for a single BA’ or ‘at its price point’, but overall. The bass is fast and resolving, as expected from a BA-based earphone, but it is also surprisingly punchy, even aggressive at times. Impact is greater than with the Etymotic ER-4S and ACS T15 but not quite a match for the VSonic GR07 or Fischer's own dual-dynamic Tandem.
Value (8.5/10) - When a mid-level earphone performs as well as this one does, it draws comparisons with top-tier earphones, as in the review above, and those rarely play in its favor. The SBA-03, however, holds its own in many ways against higher-end products from the likes of JVC, ACS, and VSonic.