Thanks to those who recommended checking the Corvette Stables -- I never really noticed that before -- some cool stuff there. There wasn't a plethora of info there on lifts, but it pointed me in the right direction. I also did a fairly extensive search on this forum as well as CorvetteForum as well as the internet and I've come up with what I think is a fairly comprehensive list of the quality lifts on the market.
I have now decided on the 4 post. I like the ease of drive-on/drive-off. If I can find (and afford) a 4-post with a rolling air jack, then the ease/convenience of tire/suspension access makes the 4-post the obvious choice. True, the 4 posts take up more room, but as far as stability, safety, convenience, mobility, not needing special concrete, etc., I think the one downside is substantially outweighed by all the upsides when compared to other styles of lifts.
Here's what I've got:
www.directlift.com -- certainly can't beat the price on the Pro-Park 7. Comes standard with a Jack TRAY (doesn't roll though, and no jack). Like the color - black - matches the Vette, the Harley, the MDX, the toolchests, etc...
www.backyardbuddy.com -- a well-known name in lifts apparently. Jack TRAY (it rolls at least), but unsure on the rolling air jack.
www.autolifts.com - the Bend Pak HD-12 Space Saver -- I like the 12,000 lb capacity vs. the 7000 of the others... Does have rolling air jacks which are PRICEY!!!! Saw reference elsewhere to a Bend Pak Free Wheel which had scissor jacks flush mounted in the ramps -- neat idea, but model is apparently discontinued.
www.stingerlifts.com - appears to be a quality lift - annoying that no prices are listed on the website. I like the polished aluminum on the SC model. Some nice accessories - no rolling air jack though.
www.doublepark.net - also appears to be a quality lift... ALSO annoying - no prices on the website. Like the ability to have custom colors. Nice FAQ though...
www.mohawklifts.com - the open beam model looks neat. specfically indicates rolling air jack compatibility. AWFUL color - can you say Ronald McDonald???
www.autolifters.com (thanks JP) - I REALLY like the extra clearance on the M6 Plus! Lots of good website info on safety. Interesting "slam" on DoublePark's lift... Might also apply to the Stinger and Pro-Park -- hard to tell from the pictures.
I honestly have no idea at this point which one to purchase. Ordered brochures on all of them to assist in the decision. I anticipate whichever one I do purchase, I'll have to fabricate the rolling air jack as the only ones I've seen prices on have been $3000 JUST FOR THE JACK!!