I'm 6'4", and my garage ceiling is 8.5'. I can stack two cars, as long as they're viper-like. I love the chair creeper for changing oil, as well as other maintenenace and detailing. I recently bought my second Viper; an '02 RT/10. I was able to remove the rear differential for a gear change, change the exhaust, detail the undercarriage, etc., without back-ache or head-ache. That 4-post lift is the best tool I ever bought. Even for waxing/polishing. You always get to do the work at eye-height. Call me lazy, but at 45 yrs old, I just can't bend for hours and hours like I used to. Probably the most difficult decision was 2-post vs 4-post. A 2-post MUST be bolted securely to the floor. A 4-post can be portable. A 2-post allows you to do suspension, brake, and wheel/tire work without a separate jack. With a 4-post, you have to use a separate jack. But you get to position that separate jack with your car already in the air. With a 4-post, you don't have to worry about placing the lift pads in the right position so as to not damage the frame or body. With most 2-post lifts, you also have to worry about limited clearance when opening the car's doors.
Anyway, as you can tell, both have advantages/disadvantages. My advice - If you do a lot of brake, wheel, or suspension work, go with a 2-post. Otherwise, a 4-post is the ticket. Either way, I'll bet you're back on this message board in a few weeks in disbelief that you lived without a lift for so long!
