I have used Winson & Newton, and M. Graham & Co. brands with equal success. One I got at Micheal's and one at Craft Wharehouse -- I forget which from where.
Bu tthey are equally good.
I use Artist's Low-Odor Mineral Spirits for thinning.
www.naplak.com/modeling ... a free site for modelers
www.scalehobby.com/forum/index.php ... a nice Modeling Forum