I think either of the three will do the job. The black Baxley is actually $215 and the colors are $225. The Condor is $235. The Bike Grab $190. To me, this is close enough that you should buy what you want.
I looked at the Baxley and Condor at last years Cycle World Show. The Condor demo was much more impressive with guys (from the crowd) pulling on the handle bars trying to tip the bike over....no go! The Baxley would lift off of the ground making you think it was less stable. After learning more about them, I believe it is due to the clamping action of the Baxley and, in retrospect the lifting was not a real problem.
Looking objectively at the two here are my observations:
Condor - Pros - Superior construction. Folds down for storage/transportation. Aluminum and stainless with rubber coated parts that contact the wheel (well the tire actually!). No maintenance.
Cons - Doesn't clamp the tire, but is extemely stable anyway.
Baxley - Pros - Unique design since it clamps the tire as it pivots into place.
Cons - All metal is powder coated paint. I have seen many chipped and rusted. The "fingers" that allow the two pieces to slide together when it clamps the tire need to be lubed periodically. Doesn't fold up for storage/transportation.
I have not used the Bike Grab, but it also looks like it would do a great job. It appears to me that the tire "wedges" itself into the upper V groove that is formed by the painted tube frame (they say it clamps like a vice), so it doesn't have an active clamp like the Baxley. The Condor does a similar thing but into a rubber coated "V". It seems that the paint will eventually wear off. It also appears that it doesn't use the rocking bottom plate like the other two so I wonder if it is as stable since it grabs the bottom, not the rear of the tire.