I have a Mark III Hunter, and it serves me quite well. MSRP on it is right around $600, though.
Field stripping and cleaning is a bit of a PITA, but the more you do it the easier it gets.
I recently had the opportunity to shoot a friend's new Browning Buckmark Bullseye Target.
This all-black URX model runs right around $500. The stainless model is closer to $700.
When comparing both guns IN STOCK FORM, I'd definitely go with the Browning. The trigger on the Buck Mark is light and crisp right out of the box.
With some VQ internals, the Ruger will come out on top, and it sounds like you're familiar with the vast aftermarket for it.
However, with your price point, you're not looking at either of those guns.
You'd be looking at the MKIII target model or bull barrel model in the Ruger, or the Buck Mark Contour 5.5 URX or Buck Mark Contour Lite 7.25 URX in a Browning.
If you're not crazy about swapping out triggers and sears, I'd go with a Browning... IMO, it's a better gun out of the box.
If you're not afraid to take a MKIII apart, and you're willing to spend more money on upgrades down the road, I'd pick the Ruger. If this is the road you choose, I'd also save up my pennies and get the Hunter or Competition models.
If budget is a MAJOR concern, I'd be tempted to go with a Beretta Neos.
Made in the US, EASILY interchangable barrels, quite accurate, and reasonably priced. The Neos INOX comes with two barrels (4.5" & 6") for $375.
Hope all that helps rather than confuse.