Well, it depends! I have a smokin' recommendation at under $800, but it's tubes! The Cayin TA-30 from BizzyBee Audio is a really great sounding integrated amp. I've owned at least 15 different integrated amps that retail for $600-$2500 and the Cayin is my favorite.
If you require Solid State, I would recommend buying used and getting a Bryston B-60. It is a very smooth sounding unit and can sometimes be bought for under $1000 used. It comes with a transferable 20 year warranty, so he should be covered for many years.
I've also owned the Arcam Alpha 10 Integrated which I actually preferred over the Bryston because of its good sound and funtionality. They can be purchased used for $600-750. The Alpha 10 was replaced with the Arcam Diva 85, which gets great reviews. Also, the Creek 5053SE gets great reviews and can sometimes be bought used for under $1000.
Enjoy,
TIC
If you require Solid State, I would recommend buying used and getting a Bryston B-60. It is a very smooth sounding unit and can sometimes be bought for under $1000 used. It comes with a transferable 20 year warranty, so he should be covered for many years.
I've also owned the Arcam Alpha 10 Integrated which I actually preferred over the Bryston because of its good sound and funtionality. They can be purchased used for $600-750. The Alpha 10 was replaced with the Arcam Diva 85, which gets great reviews. Also, the Creek 5053SE gets great reviews and can sometimes be bought used for under $1000.
Enjoy,
TIC