Hard Drive vs NAS for one box systems
Please excuse me if this is an obvious question - I'm a newb to all this.
I'm looking to buy a one-box streaming system and will be testing a few shortly. I'm interested in a few of them, but mostly the ONKYO CR-N755 and the Naim Unitiqute 2. Price of the Naim isn't an issue as long as I can tell a clear difference in sound from the cheaper options like the Onkyo.
I've just been through the painful exercise of putting 2000 or so CD's onto a hard drive as FLAC files. My house has really poor wireless and therefore I've never really wanted to go down the NAS route.
I've heard anecdotally that either of the above two mentioned units can struggle with a large hard drive attached to the rear USB port and would be much better with a NAS.
1) Is this true?
2) Should I maybe go for a NAS and just sit it next to the one box system (perhaps wired)?
3) Any other advice would be great.
I looked for other threads on this topic and there were a few but they descended into the effectiveness of NAS backups etc. I'm not interested in that, just in whether a hard drive could be made to work effectively or whather a NAS is really required.
Cheers in advance.