Fashion is to get an Islabike, but IMO, if you want to get something she will find easier to ride, then look at the early rider range.
Where are you? If you want to encourage her to get on the balance bike, then can you arange to meet other parents with balance-bikers at a local skatepark, or pump track.
Initially, we spent alot of time at a couple of local skateparks as the smooth surface is idea for little wheels and learning to glide. Pump tracks (or “the bumpy path”) are the favourite place now though. Don’t take your own bike as she will need all your attention and will probably only ride for less than half an hour at a time.
I am eyeing up an early rider trail runner XL to replace our little balance bike (for a tall 2.5 year old). I know she could ride a pedal bike, but I think the small wheels and low ground clearance would hinder her when riding trails. Just need to figure out how to put a little disc brake on the back.
Pete