having my first Stone Imperial Russian Stout. It's a lot smoother than I expected. I like it!

One of the best of its kind IMO. Really ages well too - worth picking up a bottle, stashing it in a cool spot for a year, then cracking it open. Even smoother if you can imagine.
I've got a bunch of them to do just that. Question for the beer guys around: If I age a beer, will it be OK to do in an ambient temperature of around 70 degrees? Or should I make room in the fridge. Unfortunately, these are pretty much my only options.
I've always aged them at cellar temperature, or about 55 degrees. Fridge would be second choice. Only tried room temp once, with a Victory Old Ho, and it wasn't as good as the one I aged in the basement.Generally, the bigger/higher alcohol the brew, and the more hops, the better it ages. I did a vertical tasting of Middle Ages Druid Fluid barleywine a couple of years back, 2000 through 2004 vintages. Fresh, it's a hoppy barleywine, just full of juicy citrus hops over a caramel maltiness. After a year or two the fresh, aromatic hops subside leaving behind a hoppy spiciness in the flavor and it becomes more about the malt. Gets a bit drier, too. After three or four years it begins to oxidize and a cardboardiness begins to emerge - definitely suboptimum.
Things to remember - unlike wine, keep the bottles upright. Get enough to try one every 6 months or so and, when the taste starts to go south, plan on drinking them soon afterwards. Don't do what i did and figure "hey, that Aventinus will age perfectly" and forget about it for three years - like drinking a hefeweiss soaked cardboard box.
BA had an entire forum on aging beers - some great info there.