Hey, I don't blame you for wanting something NOW!!!
The G26/27 is one great gun, holding a full 10/9 rounds, but for me, it was too FAT!
I know it's your call, and since you've carried a revolver all this time, the extra width on the Glock will still be 1/2" slimmer than your wheel, but...
Take a look at the Kahr P9 and P40 along with the Covert models before you decide. They are all polymer framed, and already available from Kahr. They're just not as small as the "MK" line. The slide length of the Kahr P's is the same as the Glock 26/27's.
On the Covert, the grip length is the same as the Mini-Glocks, and on the standard "P" models, the grip is about the same length as the Glocks with the Pearce mag extension.
Where's the bonus? Weight and thickness. The Polymer Kahr is still less than an inch wide, and weighs around 16 - 17 oz.
Where's the drawback? Less rounds. 6/5 +1 with the 9/40 Covert and short mags, or 7/6 with the 9/40 "P" series, or the Covert with the extended mag (included).
Glock or Kahr... either of those pistols will SERVE YOU WELL!