Will this gun see use in competition? It'll make a small difference to my answer.
Generally, I'd say get a MkII Ruger, stainless if possible. I don't like the heavy bull barrels, they throw off the balance of the gun without doing a thing to improve accuracy.* I regularly shoot 50-yard sub-1" groups off a rest with my standard barrel MkII.
I've never had any reliability problems with the MkII, save a few that belonged to my gun club and were cleaned once a year, if that. The same club, by the by, had a couple of Buckmarks that were horrid in the reliability department, even when clean.**
For a dedicated target gun, get a Baikal IZH-35M. Guy in the Metro Pistol Leauge shoots regular Master scores with his (something I can't even do with my Pardini.***) For accuracy on the cheap, the Baikal is the way to go.
- Chris
* - Some really strong people might not be bothered by the heavy barrel; I personally can't stand the things. If it doesn't bother you, go for it, but I wouldn't pay extra for one.
** - They would shoot themselves loose, starting at the topstrap screw. Very annoying.
*** - Yet...