For a plinking 22lr revolver, between the two you mentioned, I would opt for the SP101. Better overall firearm and will retain value much better than a LCR. Also, you'll want the hammer spur for plinking, nothing beats single action for those accurate shots and the LCR is double-action-only.
That said, You can look into other 22lr revolvers for plinking.
If you want to stay with Ruger, don't overlook some of their single action revolvers. The single-ten, single-nine and single-six (they also offer a convertable 22lr/22wmr single-six).
http://www.ruger.com/products/newModelSingleSix/index.html
If you wanted to stay in a snubnose platform, but would like a hammer spur, you can look into a Charter Arms Pathfinder or a Taurus 94 (taurus also has larger barrel 22lrs to choose from as well).
http://www.charterfirearms.com/products/Charter_Pathfinder_72224.asp
http://www.taurususa.com/product-details.cfm?id=386&category=Revolver&toggle=&breadcrumbseries=
Smith and wesson has several options as well. They will most likely be the most expensive of the bunch, but they are nice.
As for your request on the 9mm LCR...
What is this going to be used for? a carry gun, home defense? or just going to the range?
If anythiong but a carry gun, then I wouldn't even consider it. I really don't like the whole moon-clip requirment for a revolver anyway. If I was looking for a 9mm revolver, I would try to find one that doesn't need a moonclip at all.
Something like the Charter Arms Pitbull 9mm. No moonclips required.
http://www.charterfirearms.com/products/Charter_Pitbull_79920.asp
If it will be for range or home defense/nightstand gun.. do yourself a favor and get a bigger gun. One possible in .357 and sell off your old 9mm stockpile.
PS, I chuckled at your name... I guess forever isn't as long as it used to be