Protecting Motor Servos ESC?

So I've done a bit of reading lately and have decided that in the next few weeks I'll be buying a Brushless E-Revo.


I was just wondering if anyone bothers using roll cages in their cars to protect the internal components?

I was looking at something like this:[url=http://www.rcplanet.com/RC_Solutions_Roll_Cage_E_Revo_p/rcs157.htm]RC+157 RC Solutions Roll Cage E-Revo[/url]

or this: [url=http://www.rollcagecity.com/gallery/displayimage.php?album=36&pos=8]VGRacing / Roll Cage City Photo Gallery - Traxxas® Mini E-Revo Roll Cage/RED1[/url]


So far the pros and cons I've got are;

Pros:
- less likely to break/damage the motor, esc and servos when/if you flip your car.

Cons:
- added weight.
- getting plastic bodies fit over roll cages

I don't think they're too heavy though..


I was also looking at getting one of the outerwears rc car covers: [url=http://www.outerwearsracing.com/proddetail.asp?prod=202644]TRAXXAS E-REVO & (BRUSHLESS EDITION) SHROUD W/VELCRO CLOSURE 20-2644 - Outerwears, Inc. - Original manufacturer of Pre-Filters & Shockwears[/url]

Does anyone use these? Again there are a few things that I'm curious about:

- Heat on the motor?
- Weight? (not so much, I couldn't imagine it making a big difference..)