What's your budget? This is important as there are clear choices depending on money constraints. Let's say you want to spend 1000-2500 kr or thereabouts - most people would recommend a CYMA AK of some sort as these are durable, efficient and nice performing rifles for the asking price. Order from shops like gunfire.pl would be my recommendation, as the selection may be a bit broader.
Going up in price to about 3000-4500 kr, you typically choose between an AK from either E&L or LCT. Most of the differences between them have to do with things like finishing for wood furniture as well as metal receivers having different coatings. It's somewhat of a toss up IMHO, so look at pictures and decide for yourself.
I would advice to go with an AK74, as using one together with pretty much any Russian loadout would not look goofy. AKS74 is obviously the way to go if you want a folding stock.
There are also variants like the AK105 and AKS74u, but these are used more among special forces and police units respectively, so they might not fit well with your style. Once again, an AK74 from E&L or LCT is the most flexible choice.
Are you interested in focusing on specific units/countries, or do you just like the look of an AK?