Hiya, and welcome back!
This thread might help you out- we've been discussing active sims we've been playing on:http://www.goreanforums.net/viewtopic.php?f=7&t=16871
I will say, if you're more into roleplay than lifestyler, check Illyros out, they're most busy on Euro time, too. http://counterearth.enjin.com/
As for shopping- what type of style are you wanting to go for? Standard camisks? Chains/jewelry? Tahari? Scraps of fabric? Fancy high-slave finery? I can think of a few decent outfits for each.
Soedara has some nice stuffhttps://marketplace.secondlife.com/stores/84494
as does On a Larkhttps://marketplace.secondlife.com/stores/51550
If you're on a budget, check out the 25L Tuesday Sale, sometimes you can luck out and find some nice stuffhttp://seraphimsl.com/category/recurring-events/weekly/25-linden-tuesday/
Or, the We <3 RP sale always has some good stuffhttp://seraphimsl.com/category/recurring-events/monthly/we-love-role-play/
And if you're needing to update to mesh (def update to mesh, it's so much better!) the Maitreya mesh bod is the one that's most supported, followed by SLink (the Physique is sleeker, more model-like and their Hourglass is more curvy/Jessica Rabbit looking), with Belleza, TMP, and others being lesser supported. But try demos if you need to and see what you like.
Likewise, for mesh heads- CATWA and Lelutka seem to be the most supported, with Genesis Labs coming up third, I believe, and Fiore and others lagging behind. The newest thing is Bento supported mesh heads- which will respond to more of the head sliders for more personalization but they are very expensive right now (3-5k Lindens).
Check that Seraphim page for more sales to hit if you want, I get good stuff at Collabor88, The Arcade, Fantasy Collective, the Fantasy Gatcha, Epiphany, Uber and more.
Have fun updating your av- and checking out new sims!