I'd get one of the models with the standard handguards if I were you. Then again, I like to keep my rifles light enough to carry all day and handle quickly, so I don't have much use for heavy railed handguards or the associated accessories; e.g. fvgs, lasers, bipods
etc on an AK. ymmv.
Imo, if you want something a bit more interesting than the base SGL21 models, you should get one with a side-folding stock, (standard or triangle). You could always easily swap out the handguard yourself down the road, (and the take-off poly ones would be easy to sell), but installing one of those stocks on a standard fixed-stock AK is quite a bit more difficult.