You have way too much disposable income. Did you hit the lottery or recently retire or something?
It's a good thing because you're providing valuable feedback between many headphones that people have questions for. Unlike many others who only criticize headphones they've barely or never tried (with amps that don't pair well)... or fanboy over their favorite headphones, you actually own many of these headphones with various amps that pair well with them. Thank you for sharing your thoughts on basically the entire Sennheiser HD lineup, along with other headphones from other brands.