I don't believe a CBX is unreliable as a daily rider. Plenty of them out there being ridden all the time. Heck they built a touring bike on that platform. Why worry about depreciation on the classic when you don't on the new bike? Money for money, the classic bike will still be worth more at the end of X years than the CB1100. It's not like you will beat the crap out of either one. Hell, update some components just keep the originals.
2006 Ducati S2R1000
1990 HD Ultra Classic
2000 Suzuki SV650 race bike
1971 CB175 vintage racer inabox