I’ve always had fritz boxes but they were always provided for free by the ISP. Not sure if I’d buy one myself as they seem quite expensive and I really don’t need any of the “fancy” features it provides. But I also never had any problems with them either.
If you’re looking for a dedicated server there it’s always worth checking their “Serverbörse”. Sometimes customers want non-standard hardware upgrades in their servers and when they cancel they can’t add just rent them out in their normal price classes again so you can get servers with random upgrades at a discount.