Thanks guys. After great deal of research and try outs, I concluded that SU is not yet there for fine designing. Its power is in quick presentations and models.
Saying that, I have not finalized the tool I will use but am glad that at least I won't spend more time with SU for this purpose. But, I will surely use SU for lot other reasons.
till then so long.. (not for long)
Pankaj
ps: Thanks Alan for pointing to new tool.