I would post this question in the Texas forum.

Here is a link that might be useful: Texas

Thanks to all for the valuable contributions and suggestions. I much appreciate that.
Japanese Ligustrum looks highly invasive. I have these next to the A/C unit. This may be a promising one.
Mackel, I did not quite understand the monoculture. Are you suggesting to have different species of screening plants? When mature, the screen would look odd, I believe. I will try to post some pics of the landscape soon.
In Richardson and Flowermound, I have seen Red Tip Phutonia in hedges about 15ft tall. Thats promising, but looks are bland. I feel Nellie (Illex) Holly is better than RTP.
On the same note, Rhus virens (Sumac) looks more like a tree. I aint sure if we can prune and train it to be a screening shrub of 12-15ft tall. I guess the mature height for Sumac is only 8ft. Pl advise.
Can you pl suggest nurseries which sells these shrubs/ small trees on retail at best prices? I need to screen a fence line for a length of about 80Ft. I am at cross-roads.
Thanks to all of you for valuable inputs.