The McIntosh amp is going to sound very nice and can sound special if paired with a high resolution speaker (such as the B&W D3). However, the McIntosh has a laid back presentation in the mids and highs. While it can sound very nice, it may not be exciting enough for your tastes.
The Luxmen, on the other hand, is a very high resolution amp but also has a very full sound in the midbass and midrange. This amp would be much more transparent and neutral when compared to the McIntosh.
Depends on what kind of sound you want.