Bookshelf speakers as nearfield monitors ?

[Zog]

I am wanting to upgrade my desktop system. I am currently running a USB input (from a Windows PC) into a Daniel Hertz preamp. From there to a tiny pair of Bowers & Wilkins powered desktop speakers. My initial thought is to get the Adam Audio T5Vs or Adam Audio A7V monitors. However the A7Vs are similar in size to a pair of Spendor D1 Bookshelf speakers. So my question is: how much downside would there be to using the bookshelf / standmount speakers?

The upsides would be (1) cost - I already have the Spendors; and (2) The Spendors look cool with a nice Macassar ebony finish, while the Adams have an industrial appearance.

 

[Elkerton]

There's no reason not to use passive bookshelf speakers instead of active monitors. There are almost as many good ones in either camp. However, you do not mention a power amp, which the passives would need and play the Spendors before moving on. Instead of Adams, which I find sound too bright, I would lean to Genelec, like the 8030s if they meet your budget.