Which one do you guys recommend?

Don't use metal vacuum attachments - even with plastic it is risky since static charges can jump to mobo. I wouldn't use a vacuum for that reason no matter how careful I am.

You're better off having any PC in a well-ventilated space, just be aware that you'll get more dust off the floor or carpet so move and vacuum carpet regularly, blow the dust out of case with can of compressed air once a year or so.

Instead of putting wood over the carpet, you can use a piece of cardboard cut a bit bigger than the case. That will make it easier to slide on the carpet.

Don't vacuum, using cans of air of air is the safest way.
I use a paint brush to get to the hard spots

vacuums create a static charge. i would recommend compressed air.

adrianr2z said:

compressed air costs a lot of money. A little can at best buy cost like 10$ canadian i dont wanna pay that much for just one time use !

Replacing burnt out parts costs a lot more.
Just use the air where you can't reach with a brush