Dpd: Just yesterday on a lengthy trip over east of me I added my 25th (twenty fifth!) Ruger MK series pistol to my current collection - NONE of them are of the "Lite" variety/configuration.
I also currently own 6 (six) Browning BuckMarks - again NONE of them are of the "Lite" variety/configuration.
Reason being - I shoot the heavier pistols better (more accurately) under virtually every condition/situation.
The "Lite" pistols I have shot in the past, that belong to my shooting partners, the first thing I think of is - I wish they had more mass/weight and/or longer barrels!
My "thought" is for you to consider the heavy barrel versions of either the Ruger MK's or the Browning BuckMarks.
By the way the pistol I bought yesterday was a Ruger MK-II stainless heavy 6 1/2" barrel (slab sided) "Competition Target Model". It is new unfired in the box with all accoutrement's (rings, bases, fired cartrdige, paperwork) - manufactured 2,001.
Best of luck to you with whichever you choose.
Hold into the wind
VarmintGuy