I choose Jeff Rowland. I've owned both Jeff Rowland Model 5 and Mark Levinson No. 23 which are about the same age. ML23 has 200w/ch and JR Model 5 has 150w/ch and both can drive B&W 802S3 with ease.
Sound: JR5 sounds much more smooth, musical and tube-like than ML23 in my opinion. With instrumental jazz JR5 present musics with more air and texture.
Build quality: JR5 is one step better than ML23 in every ways that I know.
Result: JR5 is the keeper. ML23 has to go.
You won't regret in buying either JR or ML since they are very good products. But when it comes to only one, JR is the way to go.
Sound: JR5 sounds much more smooth, musical and tube-like than ML23 in my opinion. With instrumental jazz JR5 present musics with more air and texture.
Build quality: JR5 is one step better than ML23 in every ways that I know.
Result: JR5 is the keeper. ML23 has to go.
You won't regret in buying either JR or ML since they are very good products. But when it comes to only one, JR is the way to go.