I'll second this, and when you buy a loader, find something that has a skid-steer type quicktatch system, it will make your life much easier with the availability of attachments for the loader.
In regards to the floor. Do you want something pretty, or do you want something you can use(abuse)? I used Ghostshield and a densifier(pre GS) on my floor and have zero regrets. Shop has been used (and abused) for 7 years now, and I wouldn't go back and do it any differently. Are there some stains on my cement...yes...do I care? No. There are also burnout marks and some paint overspray scattered around.
Museum quality floors look awesome until you drag a metal wheeled floor jack from one end to the other, pull in a vehicle with hot tires and let it sit, drop a hammer or something pointy, etc.
If you're constantly worried about ruining your floor finish, you'll never be comfortable working in your shop.