Wired headphone definitely quite a hassle for all those thick wire, portability-wise, detachable cable is not really helping other than changing to a better cable...

But the sound quality of the MDR-1A definitely worth the hassle of carrying around if your budget aim for getting only the sound quality part.

Well I am a careless person on small items, so very often I will swing my IEM around accidentally and hit it with other surface, thus I choose to pay more for solving all these hassle.

How good is the LDAC? Comparison of the Sony BT headsets I tested so far.

Sony XB950BT(RM688, RM550 after max discount) => AptX (384kbps)
Sony MDR-10RBT (RM794, RM694 after discount) => AptX (384kbps)
Sony MDR-1ABT (RM1299, RM969 after max discount) => LDAC (990kbps???)

After testing and consider the main factors of being portable VS sound quality:

Device: my A-15 + XBA-1 iem (very neutral and detailed except lacking bass even when DSEE activated)
Setting: Clear Audio ON (to compensate from lacking bass TO Good bass and LIVE details)
Song files: 320kbps/FLAC/other CD rips
Battery life wise:

XB950BT => 20 hours approx., 4 hours charging
MDR-10RBT => 17 hours approx. 2.5 hours charging (pay more for less battery life, seriously?)
MDR-1ABT => 30 hours max approx., 4 hours charging

Weight-wise:

XB950BT => 280g
MDR-10RBT => 210g(the only advantage among 3, but at the significant cost of other features)
MDR-1ABT => 300g

Sound Quality wise: (ClearAudio OFF, DSEE ON)

XBA950BT vs XBA-1 ==> Wins in bass department, but other sound details really lacking, even under AptX setting, which 320kbps MP3 not suppose to suffer any quality loss.

MDR-10RBT vs XBA-1=> slightly better than XB950BT overall performance except bass, but the gap can be ignored.

MDR-1ABT vs XBA-1 =>  LDAC(quality) setting selected, sound details even better than XBA-1 quite a chunk, bass part much much better than previous 2 headset.

My feel on these 3 headset + my iem:

XBA-1 iem => Purchased with RM160, 1 of the best bang for the bucks, its sound quality can literally rival many of those RM400-RM600 headphone, as long as ClearAudio is ON. No AMP needed.

XB950BT => AptX sound quality alone, I wont pay RM550 for this, maybe at most RM475 I might consider for the sake of battery life.

MDR-10RBT => even more expensive than XB950BT and still using AptX? Seriously? imo MDR-10 series is 1 of the most epic fail that not even PHA-1 AMP can save them.

MDR-1ABT => LDAC alone, I would gladly pay over RM700++ for this feature alone, combined with premium build quality and long battery life, RM969 is a well-spent and you got everything about BT headset with 0 quality transfer loss.