2D/3D basic CAD program for Home Theatre modeling/other usage

Ok;
I've already planned and built most of my basement/home theatre, however being in the final stages of finishing the basement I've decided to not finish the home theatre until at least 4-6 weeks.

What I'd like to do is put it into a simple 2D/3D CAD program, I've done many hand sketches already.

I'm willing to spend $60-$80-ish, ideally would let me quickly draw into 3D/shade/etc so I can decide some final details, and help my wife visualize.
(I learned on the drafting board 25 years ago, so drawing 2D and visualizing 3D is no problem for me, my wife can't do it)

Any recomendations? I've looked at the free google sketch-up and don't like that, honestly did not spend much time with it either.
Back in the day I used to use MacDraw/ClarisDraw/etc.
At work of course I've use commercial 3D programs, but too much horsepower for my home use, and I'd like a home 3D program for other future projects, like backyard deck, seperate 4 car garage/workshop/etc.

Thx for your advice!
(yea, I should have put it into the 3D CAD a few years ago, got so busy with life......)

This is what I want to put into the CAD program:

Plan view of overall basement/HT:


Side view of HT showing projection study (not final yet)
I'll also put the 7.1 paradigm speakers in also for acoustic treatment study viewpoint


Front view of HT room showing projection study (not final yet)


HT room about 2 weeks ago as drywall was in process going up.


View showing DIY riser along back wall

 

I'll download the microspot free demo tonight and check it out, thx.

What is the "scoop" on the Punch line-up?

MacMall has a special thru tomorrow on it:
Punch Software Home Design Studio 90100

And MacWorld gave a good review:
Home Design Studio 11.0

Yea, if I don't rush to get the final 5% done it should come out good, the "devil is in the details".
I'm so burned out of planning/design/build/shop/return/buy/build/shop/etc, as all DIY'ers learn on big projects, however the light is at the end of the tunnel.