This reference type speaker is often used for monitoring/mastering; IMHO, stick with the Dunlavy V's (provided you like their straight forward accurate qualities).
IMHO, some reasons to change might be;
1) if you were to move and the V's were simply too big in their new location. (a pity but you really have no choice)
2) if you wanted to create a combined stereo/HT system with timbre matched speakers all around and/or needed speakers with a larger sweetspot (Dunlavy V has narrow dispersion and correspondingly small sweetspot).
3) if you wanted a speaker with similar qualities that can play louder
Absent any specific requirements for a change, another high quality large reference speaker will certainly give you a slightly different sound...but is this worth the trouble/expense and risk of making a change? (slightly different does not equate to better; some material will sound slightly worse and some material will sound slightly better, all depending on the mix/mastering of the source material).
On the other hand, large speakers that sound markedly different are most probably not as good (for you), which is again a reason to stick with your Dunlavys (recall, you have already stated that you like them).
This review (see below) suggests you already have a real gem of a speaker, which I expect you well know.
http://mixguides.com/studiomonitors/Reviews/studio-monitor-audio-899/index.html
IMHO, some reasons to change might be;
1) if you were to move and the V's were simply too big in their new location. (a pity but you really have no choice)
2) if you wanted to create a combined stereo/HT system with timbre matched speakers all around and/or needed speakers with a larger sweetspot (Dunlavy V has narrow dispersion and correspondingly small sweetspot).
3) if you wanted a speaker with similar qualities that can play louder
Absent any specific requirements for a change, another high quality large reference speaker will certainly give you a slightly different sound...but is this worth the trouble/expense and risk of making a change? (slightly different does not equate to better; some material will sound slightly worse and some material will sound slightly better, all depending on the mix/mastering of the source material).
On the other hand, large speakers that sound markedly different are most probably not as good (for you), which is again a reason to stick with your Dunlavys (recall, you have already stated that you like them).
This review (see below) suggests you already have a real gem of a speaker, which I expect you well know.
http://mixguides.com/studiomonitors/Reviews/studio-monitor-audio-899/index.html