When I worked for NTL & then Sky,I have worked all over Lisburn & done a lot of jobs in both area's.
Harmony Dv is'nt a bad area,house's are fairly newish,late 70's,early 80's I'd say,Nearly all have NTL,Sky or both installed.
Closer to the main gate as well I think.
Depends if you have kids or not for school purposes I would definately not put my kids anywere near Harmony Hill as they treat service children in my opinion pretty poorly to the extent I removed my children from the school aswell as a few other families i am aware of.
I do know the houses and bungalows at West Park are very nice. and it is just across the road from a good school.
The quarters on camp that I think you're after are very nice google earth gives a nice picture
I left Lisburn 18 months ago though.
hope that helps PM if I can help anymore