Hello,
yes, it's ok, you could buy the Piko Tracks! They are 100% compatible to LGB. Many people have it, mixing with LGB-Tracks (in many german Train Forums!).
I have no Piko, cause I have only inexpensive used (LGB-) Tracks (no new ones). They are for the garden. After a year in my garden they are all brown (new or used).

PS: Piko also make smaller gauges (HO - N - TT) tracks, locos, cars, houses,...
Look HERE [KLICK!]