8X8 or 6X6 drive?

[Panther F]

Any good or bad things about them that I should know about? Like this one sold here: http://store.rc4wd.com/MAN-Military-6x6-_p_1801.html

Still having problems deciding on a truck and while I don't have a problem with a semi, it's just all that has to go with it. The expense is right up there with some of the stuff I've been watching on YouTube that looks more fun to run.

I noticed one of these kits comes "professionally assembled". Is that good or is there an option to getting it as a kit (to save $$) and build it myself?

Totally lost here and just need a few words of wisdom. These are not toys but a pretty big investment (like my Tamiya tanks) so I don't just settle for anything less.

Thanks!

~ Jeff