I'd argue against this. Blue/golden gouramis --
Trichogaster trichopterus -- are notoriously aggressive, or at least, the males are. Dwarf gouramis are just a total waste of space these days. A lot of the specimens shipped out from the Far East seem to have a viral disease, and you certainly shouldn't buy any from tanks with sick looking species. Even without the virus, they're very sensitive to incurable Mycobacterium infections.
By contrast, pearl and moonlight gouramis tend to be reasonably hardy and rarely aggressive enough to cause trouble, though males will bicker with each other if overcrowded.
Do review the temperature requirements of your fish. It's often the case less experienced hobbyists ignore this. Neons, platies and
Corydoras are similar in preferring low-end temperatures, around 22-24 C being ideal. Swordtails, danios, and some other tetras (e.g., red phantom tetra) and several barbs (rosy barbs, golden barbs, dwarf golden barbs) are similar. Gouramis on the whole prefer warmer water, as do some barbs and most tetras. Keeping fish too warm or too cold will shorten their lives, sometimes dramatically so. Any good aquarium encyclopaedia should quote the preferred temperature range of the species in question: aim for a value in between the high and low values for best results.
Cheers, Neale
also... my personal opinion, dont get a pearl gourami.. they are boring sad looking fish, get a blue or a gold gourami, or even a dwarf gourami... anyone of those look better... to me at least.