From someone whose other 'hobby' is HIFI I consider bikes in generally to be extraordinary value!
The average 2k bike has parts that are developed especially for purpose, taking account of the absolute latest technology in balancing strength, weight, longevity .. that's a lot of engineering. Sealed bearings, Ti bolts, CNCed bits – you would not find attention to detail like that in a car under 50k!
Also.. the manufacturers are constantly pushing to make the bikes, stronger, lighter, faster – always evolving.
If a company makes something that is a bit sh*t and doesn't really work/breaks .. then the market will abandon them straight away!
In HIFI .. £2k buys you a MID-LEVEL amplifier, ditto the speakers, and CD player .. and that's just about £100 quids worth of PCB and capacitors wrapped up in a Big flashy case..
^ So £6K buys you what audiophiles would consider a decent (but nothing special) system. Add to that there's so much 'smoke & mirrors' and snake oil in hifi – it's all over-hyped balls.. Bikes are so much more refreshing and real.
p.s. look up the price of nordost ODIN speaker cables if you are curious.. but swallow your coffee first
http://www.highendcable.co.uk/Nordost%20ODIN%20Speaker%20Cable.htm